<PAGE>   1

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 ---------------
                               FORM 10-Q / A No. 1
                                 ---------------

(Mark One)

           [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended June 30, 2000

                                       OR

           [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

             For the transition period from __________ to __________

                        Commission file number: 000-28909

                       GreyStone Digital Technology, Inc.
                       ----------------------------------
             (Exact Name of Registrant as Specified in its Charter)

                                 ---------------

        Delaware                                            84-1107140
        --------                                            ----------
        (State or other jurisdiction                        (IRS Employer
        incorporated or organization)                       Identification No.)

                  4950 Murphy Canyon Road, San Diego, CA 92123
                  --------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)

                                 (858) 874-7000

                                  -------------

              (Registrant's Telephone Number, Including Area Code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15 of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days. Yes [X] No [ ]

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date:

<TABLE>
<CAPTION>
TITLE OF EACH CLASS                                 OUTSTANDING AT JUNE 30, 2000
-------------------                                 ----------------------------
<S>                                                 <C>
Common Stock, $.001 par value                                16,284,475
Series A Convertible Preferred Stock,
  $.001 par value                                                 5,000
</TABLE>

<PAGE>   2


                                      INDEX

                       GreyStone Digital Technology, Inc.

<TABLE>
<CAPTION>
                                                                                    Page No.
                                                                                    --------
<S>    <C>                                                                          <C>
PART I.        FINANCIAL INFORMATION FOR GREYSTONE DIGITAL TECHNOLOGY
               AND SUBSIDIARY                                                           3

       Item 1. FINANCIAL STATEMENTS                                                     3

               Condensed Consolidated Balance Sheets at June 30, 2000
                      (unaudited) and March 31, 2000                                    3

               Condensed Consolidated Statements of Operations (unaudited) for
                      the three months ended June 30, 2000 and 1999                     4

               Condensed Consolidated Statement of Stockholders' Equity (unaudited)
                      for the three months ended June 30, 2000                          5

               Condensed Consolidated Statements of Cash Flows (unaudited)
                      for the three months ended June 30, 2000 and 1999                 6

               Notes to Condensed Consolidated Financial Statements                     7

       Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
               CONDITION AND RESULTS OF OPERATIONS                                     13

       Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT
               MARKET RISK                                                             17

PART II.       OTHER INFORMATION                                                       17

       Item 1. LEGAL PROCEEDINGS                                                       17

       Item 2. CHANGES IN SECURITIES AND USE OF PROCEEDS                               18

       Item 3. DEFAULTS UPON SENIOR SECURITIES                                         18

       Item 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS                     18

       Item 5. OTHER INFORMATION                                                       18

       Item 6. EXHIBITS AND REPORTS ON FORM 8-K                                        18

EXHIBIT INDEX                                                                          19
</TABLE>


<PAGE>   3



PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS AND NOTES

                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

                      CONDENSED CONSOLIDATED BALANCE SHEETS


<TABLE>
<CAPTION>
                                                                        June 30,
                                                                            2000         March 31,
                                                                     (Unaudited)              2000
                                                                    ------------      ------------
<S>                                                                 <C>               <C>
                                              ASSETS

Current assets:
  Cash and cash equivalents                                         $  2,858,050      $    167,299
  Accounts receivable, net of allowance for doubtful accounts
    of $40,000                                                           201,246           372,981
  Other current assets                                                    39,115            54,235
                                                                    ------------      ------------
            Total current assets                                       3,098,411           594,515

Notes receivable, including accrued interest of $29,540
  and $16,077                                                            629,540           616,077
Forensic vehicle                                                         330,000
Equipment and furniture, net of accumulated depreciation
  and amortization of $2,338,649 and $2,302,999                          293,296           278,075
Contract receivable for forensic equipment                               135,000
Deposits                                                                  87,678            87,678
Related party notes receivable, including accrued interest
  of $22,227 and $21,137                                                  72,227            71,137
                                                                    ------------      ------------
            Totals                                                  $  4,646,152      $  1,647,482
                                                                    ============      ============

                               LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable and accrued expenses                             $    528,296      $    970,092
  Notes payable to principal stockholder                                      --            20,000
                                                                    ------------      ------------
            Total current liabilities                                    528,296           990,092
                                                                    ------------      ------------

Stockholders' equity:
  Series A Preferred stock, $.001 par value; $1,000 liquidation
    preference value per share; 3,000,000 shares authorized;
    5,000 shares, Series A Convertible issued and outstanding                  5
  Additional paid in capital - Preferred stock                         5,297,286
  Common stock, $.001 par value; 30,000,000 shares authorized;
    16,284,475 and 16,278,179 shares issued and outstanding               16,284            16,278
  Additional paid in capital - Common stock                           43,909,277        39,816,415
  Subscriptions receivable from equity transactions                   (1,510,792)       (1,510,792)
  Accumulated deficit                                                (43,594,204)      (37,664,511)
                                                                    ------------      ------------
            Total stockholders' equity                                 4,117,856           657,390
                                                                    ------------      ------------
            Totals                                                  $  4,646,152      $  1,647,482
                                                                    ============      ============
</TABLE>

See Notes to Condensed Consolidated Unaudited Financial Statements.


<PAGE>   4


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)


<TABLE>
<CAPTION>
                                                                  Three months ended June 30,
                                                                    2000
                                                                 (Restated)            1999
                                                                 ------------      ------------
<S>                                                              <C>               <C>
Revenues                                                         $    540,044      $    459,570
                                                                 ------------      ------------

Expenses:
   Cost of revenues                                                   423,502           226,844
   Marketing and sales                                                258,732           166,511
   Research and development                                           340,358           237,302
   General and administrative                                         981,364           515,968
                                                                 ------------      ------------
       Totals                                                       2,003,956         1,146,625
                                                                 ------------      ------------

Loss from operations                                               (1,463,912)         (687,055)
                                                                 ------------      ------------

Other income (expense):
  Interest income, including $14,553 from related parties              27,407
  Interest expense, including $0 and $7,182 on
    loans from principal stockholder                                                     (7,182)
                                                                 ------------      ------------
       Totals                                                          27,407            (7,182)
                                                                 ------------      ------------

Net loss                                                         $ (1,436,505)     $   (694,237)


Preferred stock dividends:

   Imputed stock dividend related to issuance of warrants          (3,645,250)

   Imputed stock dividends for beneficial conversion feature         (804,103)

   Imputed cumulative stock dividends at 8%                           (43,835)
                                                                 ------------      ------------

Net loss applicable to common stock                              $ (5,929,693)     $   (694,237)
                                                                 ============      ============

Basic net loss per common share                                  $      (0.36)     $      (0.05)
                                                                 ============      ============

Basic weighted average number of common shares
  outstanding                                                      16,284,406        14,880,743
                                                                 ============      ============
</TABLE>

See Notes to Condensed Consolidated Unaudited Financial Statements.

<PAGE>   5




                      GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

                  CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                   (Unaudited)

                        Three months ended June 30, 2000


<TABLE>
<CAPTION>
                                Preferred Stock                    Common Stock
                           --------------------------  ------------------------------------ Subscriptions
                                           Additional                          Additional    Receivable
                                   Amount   Paid-In                  Amount      Paid-In     from Equity   Accumulated
                           Shares  At Par   Capital       Shares     At Par      Capital     Transactions    Deficit       Total
                           ------  ------  ----------  -----------   -------  -------------  ------------  ------------  ----------
<S>                        <C>     <C>     <C>         <C>           <C>      <C>            <C>           <C>           <C>
Balance, April 1, 2000                                  16,278,179   $16,278   $39,816,415   $(1,510,792)  $(37,664,511) $  657,390

Preferred stock sold
  for cash, net of
  expenses of $550,647     5,000     $5    $4,449,348                                                                     4,449,353

Imputed preferred stock
  dividend related to
  issuance of detachable
  warrants for common
  stock in connection
  with the sale of the
  preferred stock                                                                3,645,250                   (3,645,250)

Imputed preferred stock
  dividends for beneficial
  conversion feature                          804,103                                                          (804,103)

Common stock issued upon
  conversion of notes
  payable to principal
  stockholder                                                4,444         4        19,996                                   20,000

Common stock issued to
  pay accrued interest
  upon conversion of
  notes payable to
  principal stockholder                                      1,852         2         8,327                                    8,329

Warrants issued to
  purchase common stock                                                            406,689                                  406,689

Stock options to purchase
  common stock granted to
  non-employees                                                                     12,600                                   12,600

Imputed preferred stock
  dividends at 8%                              43,835                                                           (43,835)

Net loss                                                                                                     (1,436,505) (1,436,505)
                           -----     --    ----------  -----------   -------   -----------   -----------   ------------  ----------
Balance, June 30, 2000     5,000     $5    $5,297,286   16,284,475   $16,284   $43,909,277   $(1,510,792)  $(43,594,204) $4,117,856
                           =====     ==    ==========  ===========   =======   ===========   ===========   ============  ==========
</TABLE>

See Notes to Condensed Consolidated Unaudited Financial Statements.



<PAGE>   6


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)


<TABLE>
<CAPTION>
                                                                              Three months ended June 30,
                                                                                2000               1999
                                                                             -----------        -----------
<S>                                                                          <C>                <C>
Operating activities:
     Net loss                                                                $(1,436,505)       $  (694,237)
     Adjustments to reconcile net loss to net cash used in
       operating activities:
         Depreciation and amortization                                            35,650             40,877
         Compensation expense recorded upon issuance of warrants
           and compensatory stock options                                        419,289             93,000
         Changes in operating assets and liabilities:
             Notes receivable, including interest                                (14,553)
             Accounts receivable                                                 171,735             (7,507)
             Other assets                                                         15,120            (27,341)
             Accounts payable and accrued expenses                              (433,467)          (666,100)
                                                                             -----------        -----------
                      Net cash used in operating activities                   (1,242,731)        (1,261,308)
                                                                             -----------        -----------

Investing activities
     Purchase of forensic vehicle                                               (330,000)
     Purchase of contract receivable for forensic equipment                     (135,000)
     Purchases of software licenses and equipment                                (50,871)           (33,646)
                                                                             -----------        -----------
                      Net cash used in investing activities                     (515,871)           (33,646)
                                                                             -----------        -----------

Financing activities:
     Repayments of notes payable to principal stockholder                                           (50,000)
     Repayments of loans payable to officers                                                       (140,810)
     Repayment of short-term notes payable                                                         (402,000)
     Sale of common stock                                                                         2,752,525
     Sale of preferred stock, net of selling expense                           4,449,353
                                                                             -----------        -----------
                      Net cash provided by financing activities                4,449,353          2,159,715
                                                                             -----------        -----------

Net increase in cash and cash equivalents                                      2,690,751            864,761

Cash and cash equivalents, beginning of period                                   167,299            795,480
                                                                             -----------        -----------

Cash and cash equivalents, end of period                                     $ 2,858,050        $ 1,660,241
                                                                             ===========        ===========

Supplemental disclosure of cash flow data:
     Interest paid                                                                              $    93,425
                                                                                                ===========

Supplemental disclosure of noncash investing and financing activities:

     Common stock issued as payment for:
         Notes payable to principal stockholder                              $    20,000        $    50,000
                                                                             ===========        ===========
         Accrued interest payable                                            $     8,329        $    19,332
                                                                             ===========        ===========
         Imputed preferred stock dividends                                   $ 4,493,188
                                                                             ===========
</TABLE>

See Notes to Condensed Consolidated Unaudited Financial Statements.

<PAGE>   7


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

Note 1 - Unaudited interim financial statements:

             The accompanying unaudited condensed consolidated financial
             statements have been prepared in accordance with generally accepted
             accounting principles for interim financial information and with
             the instructions to Form 10-Q and Article 10 of Regulation S-X.
             Accordingly, they do not include all of the information and
             footnotes required by generally accepted accounting principles for
             complete financial statements. In the opinion of management, all
             adjustments (consisting of normal recurring accruals) considered
             necessary for a fair presentation have been included. Operating
             results for the three month period ended June 30, 2000 are not
             necessarily indicative of the results that may be expected for the
             year ending March 31, 2001. The unaudited condensed consolidated
             financial statements should be read in conjunction with the
             consolidated financial statements and footnotes thereto included in
             the Company's annual report on Form 10-K for the year ended March
             31, 2000.

             The results of operations and cash flows for the three months ended
             June 30, 1999 occurred before the merger and are for GreyStone
             Technology, Inc. only.

Note 2 - The merger and other matters:

             On December 27, 1999 a merger between a subsidiary of Express
             Capital Concepts, Inc. and GreyStone Technology, Inc. was
             completed, whereupon Express Capital Concepts also underwent a
             1-for-41.66667 reverse stock split (which reduced its issued and
             outstanding common stock to 480,000 shares), changed the par value
             of the stock from $0.0001 to $0.001 per share, reduced the total
             authorized common stock from 500,000,000 shares to 30,000,000
             shares, and was renamed GreyStone Digital Technology, Inc.
             Simultaneously, 15,211,627 shares of common stock of Greystone
             Digital Technology, Inc. were issued to GreyStone Technology, Inc.
             common stock holders. The transaction has been accounted for as a
             reverse acquisition, wherein GreyStone Technology, Inc., the
             operating company, is treated as the acquirer for reporting
             purposes. The balance sheets, statements of operations,
             stockholders' equity and cash flows are consolidated between
             GreyStone Digital Technology, Inc, and GreyStone Technology, Inc.
             as of June 30, 2000. All significant inter-company accounts and
             transactions are eliminated in consolidation.

             The Company has amended the quarter ended June 30, 2000 Form 10-Q
             to reflect a one-time non-cash preferred stock dividend of
             $4,449,353, the capitalization of a finders fee of approximately
             $208,000 and cumulative imputed preferred stock dividends of
             $43,835. In connection with a $5 million private placement of
             Series A Preferred Stock, discussed in detail in Note 10, the
             Company recognized an imputed stock dividend related to the
             issuance of detachable warrants, an imputed stock dividend for a
             beneficial conversion feature and imputed cumulative preferred
             stock dividends at 8%. As a result, the net loss applicable to
             common stockholders was restated from $1,644,320 to $5,929,693. The
             basic loss per common share was restated from $0.10 to $.36 as a
             result of the one-time imputed (non-cash) preferred stock dividend.

Note 3 - Notes receivable and accrued interest:

             Notes receivable at June 30, 2000 consists of two notes from an
             individual. The notes were originally due February 20, 2000, accrue
             interest at 9% and are collateralized by common stock in a company
             owned by the individual. The maturity date of the notes was
             extended to May 20, 2000 and subsequently further extended to
             August 20, 2000.

<PAGE>   8

Note 4 - Earnings (loss) per share:

             Effective March 31, 1998, the Company adopted the provisions of
             Statement of Financial Accounting Standards No. 128, Earnings per
             Share, which requires the presentation of "basic" and "diluted"
             earnings (loss) per common share, as further explained in Note 1 of
             the notes to the audited financial statements of the Company,
             included in Form 10-K for the fiscal year ended March 31, 2000.
             Basic net loss per share applicable to common stockholders includes
             preferred stock dividends totaling $(.28) for the three months
             ended June 30, 2000 (See Note 10).

             Since the Company had losses applicable to common stock in the
             three month period ended June 30, 2000 and 1999, the assumed
             effects of the exercise of outstanding stock options, warrants and
             convertible preferred stock were anti-dilutive and, accordingly,
             dilutive per share amounts have not been presented in the
             accompanying condensed consolidated unaudited statements of
             operations. Such options, warrants and convertible preferred stock
             could potentially dilute basic earnings per share in the future.

Note 5 - Segment reporting:

             Effective March 31, 1999, the Company adopted the provisions of
             Statement of Financial Accounting Standards No. 131, Disclosures
             about Segments of an Enterprise and Related Information ("SFAS
             131"). SFAS 131 established standards for the way that public
             enterprises report financial and descriptive information about
             reportable operating segments in annual financial statements and
             interim financial statements issued to stockholders. SFAS 131
             supersedes SFAS 14, Financial Reporting for Segments of a Business
             Enterprise, but retains the requirement to report information about
             major customers.

             Information on industry segments are scheduled below:

<TABLE>
<CAPTION>
                                       Government       Commercial    Common/Corporate      Total
                                       ----------       ----------    ----------------      -----
<S>                                    <C>              <C>           <C>                   <C>
Three months ended June 30, 2000

             Revenue                   $ 540,044        $       0        $       0        $   540,044
                                       =========        =========        =========        ===========

             Net Loss                  $(252,103)       $(230,445)       $(953,957)       $(1,436,505)
                                       =========        =========        =========        ===========

Three months ended June 30, 1999

             Revenue                   $ 448,541        $     148        $  10,881        $   459,570
                                       =========        =========        =========        ===========

             Net Loss                  $ (56,740)       $(125,228)       $(512,269)       $  (694,237)
                                       =========        =========        =========        ===========
</TABLE>

<PAGE>   9


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

Note 6 - Warrants:

             The Company has issued warrants in conjunction with the sale of
             convertible notes payable, assisting the Company in acquiring
             capital, the extending of loans, as an incentive to equity
             investors and as part of the consideration paid to various
             consultants. Based on the provisions of Statement of Financial
             Accounting Standards No. 123, "Accounting for Stock-Based
             Compensation" ("SFAS 123") using the Black-Scholes option pricing
             model and assuming a risk-free interest rate of 6%, expected
             warrant lives of one to ten years, expected volatility of 5% to 60%
             and dividends of 0%, the compensation expense relating to the
             warrants issued was $406,689 and $88,800 for the three months ended
             June 30, 2000 and 1999, respectively. Each warrant entitles the
             holder to purchase one share of common stock upon exercise. The
             warrants expire at various dates from 2002 through 2010. Additional
             information regarding warrants outstanding at June 30, 2000 and
             changes in outstanding warrants during the three months then ended
             follows:

<TABLE>
<CAPTION>
                                                                 Number of      Exercise
                                                                 Warrants       Price
                                                                 ---------      --------
<S>                                                              <C>            <C>
                   Outstanding at April 1, 2000                  7,209,096      $4.95 to $12.00
                        Granted                                  1,550,000      $5.38 and $12.00
                                                                 =========

                   Outstanding at June 30, 2000                  8,759,096      $4.95 to $12.00
                                                                 =========

                   Exercisable at June 30, 2000                  7,741,097      $4.95 to $12.00
                                                                 =========

                   Weighted average fair value of warrants
                       granted during the period                                     $2.61
                                                                                     =====
</TABLE>

Note 7 - Income taxes:

             The Company had net operating loss carry forwards at June 30, 2000
             of approximately $34,100,000 available to reduce future Federal
             taxable income and approximately $10,400,000 available to reduce
             state taxable income, if any. The net operating loss carryforwards
             expire between 2006 and 2020 for Federal tax purposes and 2001 and
             2005 for state tax purposes. The related deferred tax assets were
             fully reserved through valuation allowances at June 30, 2000 and
             March 31, 2000 and, accordingly, there was no provision or credit
             for income taxes.

             The expected Federal income tax benefit, computed based on the
             Company's pre-tax loss and the statutory Federal income tax rate,
             was approximately $559,000 for the three months ended June 30,
             2000. The potential benefits were eliminated through equivalent
             increases in the Company's valuation allowance primarily for
             deferred tax assets arising from net operating loss carryforwards
             (see Note 11 of the notes to the audited financial statements of
             the Company which are included in the Form 10-K for the fiscal year
             ended March 31, 2000).


<PAGE>   10


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

Note 8 - Stock option plans:

             As further explained in Note 13 of the notes to the audited
             financial statements, which are included in the Form 10-K for the
             fiscal year ended March 31, 2000, the Company has two stock option
             plans - the "1991 Plan" and the "1994 Plan". In addition to
             incentive stock options (ISOs) issued under the plans, the Company
             issued nonqualified stock options (NSOs) outside of the plans in
             1994, 1995, 1997 and 1998. Information related to the plans and
             other options granted follows:

<TABLE>
<CAPTION>
                                           Options      Outstanding at
Year                     Type           Authorized            06/30/00
----                     ----           ----------      --------------
<S>                      <C>            <C>             <C>
1991 Plan                ISO             1,000,000             550,000
1994 Plan                ISO             2,000,000           1,753,762
1994                     NSO               200,000             200,000
1995                     NSO               200,000             200,000
1997                     NSO               640,000             640,000
1998                     NSO               750,000             750,000
                                         ---------           ---------
                                         4,790,000           4,093,762
                                         =========           =========
</TABLE>

             The amount of compensation expense recognized for the three months
             ended June 30, 2000 and 1999 relating to the granting of NSO stock
             options under the provisions of SFAS No. 123 was $12,600 and $4,200
             for the three months ended June 30, 2000 and 1999, respectively.

             In the opinion of management, if compensation cost for the stock
             options granted to employees had been determined based on the fair
             value of the options at the grant date under the provisions of SFAS
             No. 123 using the Black-Scholes option pricing model and assuming a
             risk-free interest rate of 6%, expected option lives of one to ten
             years, expected volatility of 5% to 60% and dividends of 0%, the
             Company's pro forma net loss arising from such computations would
             have been increased by approximately $132,640 and $177,000 for the
             three months ended June 30, 2000 and 1999, respectively.

             Additional information regarding options outstanding under the
             Company's stock option plans at June 30, 2000 and changes in
             outstanding options during the three months then ended follows:

<TABLE>
<CAPTION>
                                                               Weighted
                                       Shares or price          Average
                                             Per Share   Exercise Price
                                       ---------------   --------------
<S>                                    <C>               <C>
Outstanding at April 1, 2000                4,106,762        $4.31
Granted                                         9,000        $5.00
Cancelled                                     (22,000)       $5.10
                                       --------------
Outstanding at June 30, 2000                4,093,762        $4.43
                                       ==============
Price Range at June 30, 2000           $.275 to $6.80
                                       ==============
Exercisable at June 30, 2000                3,672,248        $4.36
                                       ==============
Available for grant at June 30, 2000          696,238
                                       ==============
Weighted average fair value
  of options granted during period                           $2.86
</TABLE>



<PAGE>   11


                GREYSTONE DIGITAL TECHNOLOGY, INC. AND SUBSIDIARY

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

Note 8 - Stock option plans (concluded):

             The following table summarizes information about stock options
             outstanding at June 30, 2000, all of which are at fixed prices:

<TABLE>
<CAPTION>
                                              Weighted
                                               Average
                                             Remaining
                                           Contractual
                                               Life of
                             Number of         Options          Number of
                               Options  Outstanding in            Options
Exercise Price             Outstanding           Years        Exercisable
-------------------------------------------------------------------------
<S>                        <C>          <C>                   <C>
 $0.275                        200,000            1.12           200,000

 $1.000                        200,000            4.01           200,000

 $3.825                      1,054,762            3.16         1,037,562

 $4.950                      1,050,000            4.13           966,666

 $5.000                          9,000            9.90                 0

 $5.100                      1,002,000            8.98           703,020

 $6.000                        553,000            9.68           550,000

 $6.800                         25,000            7.90            15,000
                             ---------                         ---------
                             4,093,762                         3,672,248
                             =========                         =========
</TABLE>

Note 9 - Related party transactions and balances:

             In July 1999, a professional services agreement was made between
             the Company and The Pointe-Force Company, Inc. ("Pointe-Force"), an
             entity controlled by the spouse of a director of GreyStone.
             Pointe-Force supports the Company in the areas of mergers and
             acquisitions, strategic planning, corporate financing and relations
             with the investment community. Under this one-year advisory
             services agreement, the director is compensated in the amount of
             $11,000 per month, not including expenses. Additionally, the
             Company loaned $20,000 on August 6, 1999, $10,000 on September 22,
             1999 and $20,000 on November 17, 1999 to Pointe-Force and
             GreyStone's director. All loans are for a one-year term and bear
             interest at a rate of 8.75% per year. The maturity date of the loan
             that was due on August 6, 2000, is currently being extended.

<PAGE>   12

Note 10 - Series A Convertible Preferred Stock

             On May 22, 2000, the Company completed the sale of $5,000,000 in
             convertible preferred stock to a group of private investors. The
             Company issued 5,000 shares of Series A Preferred Stock,
             convertible, immediately at the holders' discretion, into common
             stock at a rate of the lower of (1) 250 shares of common stock per
             share of preferred stock (equivalent to an investment of $4.00 per
             share of common stock issued) or (2) 80% of the volume weighted
             average price for the previous 250,000 shares traded prior to
             submission by the preferred stockholder of a conversion notice to
             the Company. Embedded in the preferred stock is an optional feature
             allowing the investor to convert to common stock immediately, as
             well as a mandatory conversion requirement effective three years
             after the date of issuance. The Series A investors also received
             warrants to purchase 1,250,000 shares of common stock at an
             exercise price of $5.38 per share, and registration rights on the
             conversion shares and the shares issuable upon the exercise of the
             warrants. The preferred stock provides for a cumulative dividend of
             8% per year, payable in common stock or cash. After payment of a
             10% commission for introducing the investors to the Company, and
             legal fees totaling approximately $50,000, the Company received net
             proceeds of approximately $4,449,000 which it intends to use for
             general corporate purposes. In accordance with the Emerging Issues
             Task Force (EITF) Issue No 98-5, the Company recognized a
             beneficial conversion feature in the amount of $804,103 as a
             one-time imputed (non-cash) preferred stock dividend. The amount
             represented the difference between the initial conversion price at
             the date of issuance of the preferred shares and the market price
             of the common stock at that date. In addition, the Company recorded
             a one-time, imputed (non-cash) preferred stock dividend of
             $3,437,500 as a result of allocating a portion of the proceeds
             received to the fair value of the warrants issued, as determined by
             the Black-Scholes model.

             In connection with the above sale of convertible preferred stock,
             the Company issued warrants to purchase 75,000 shares of common
             stock at an exercise price of $5.38 per share to the party who
             introduced the Company to the Series A private placement group. As
             a result, the Company recorded a one-time imputed (non-cash)
             preferred stock dividend of $207,750.

             The aforementioned imputed preferred stock dividends associated
             with issuing the stock resulted in a one-time non-cash loss
             applicable to common stockholders of $(0.27) per share. The Company
             also recorded a non-cash preferred stock dividend of $43,835 for
             the three month period ended June 30, 2000, due to the 8%
             cumulative preferred stock dividend feature.


<PAGE>   13


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

FORWARD LOOKING STATEMENTS: NO ASSURANCES INTENDED

This report contains statements that are not purely historical, and as such are
forward-looking statements under the federal securities laws. These include
forward-looking statements regarding management's intentions, plans, hopes,
beliefs, expectations or projections of the future. These forward-looking
statements involve risks and uncertainties, including without limitation,
acceptance of the Company's products and services: additional financing
requirements within the next 12 months; the ability to recover or collect from
its investment activities and loans; the impact of competitive products or
pricing; technological changes; the effect of economic conditions; the ability
to successfully commercialize the company's entertainment products; the
company's dependence on key engineering, technical, and other personnel skilled
in government contracting; the ability of the government to terminate contracts
and subcontracts at any time; and other risks and uncertainties detailed from
time to time in the company's reports filed with the Securities and Exchange
Commission. One or more of these factors could affect the company's business and
financial results in future periods, and could cause actual results to differ
materially from plans and projections. There can be no assurance that the
forward-looking statements in this report will prove to be accurate, and
issuance of such forward-looking statements should not be regarded as a
representation by the company, or any other person, that the objectives and
plans of the company will be achieved. All forward-looking statements made in
this report are based on information presently available to management, and the
company assumes no obligation to update any forward-looking statements.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS FOR THE THREE MONTHS ENDED JUNE 30, 2000 AND 1999

Revenues for the three months ended June 30, 2000 were $540,044 as compared to
$459,570 for the three months ended June 30, 1999. During both of these periods,
the Government Strategic Business Unit (SBU) generated essentially all revenues.
The sales increase of $80,474 (or approximately 18%) between the periods was
primarily the result of additional tasking on current contracts and the
expansion of our government customer base. During this reporting period, the
Government SBU expanded its tasking on current contracts supporting the
military's Joint Forces SemiAutomated Forces simulation software and the Joint
Strike Fighter program. Additional delivery orders under GreyStone's Battlefield
Visualization contract with the U.S. Navy's Space and Naval Warfare Systems
Center - San Diego (SPAWARSYSCEN - San Diego) have also been awarded for new
engineering services work with the Marine Corps Warfighting Laboratory, Naval
Warfare Development Center, Naval Air Warfare Center Weapons Division and the
Space and Naval Warfare Systems Advanced Concepts and Technology Division. As of
June 30, 2000, the Company's backlog was approximately $1,087,000. All of the
backlog is expected to be completed within the current fiscal year ending March
31, 2001. In March 1999, GreyStone was awarded the five year $15.1 million
delivery order contract from

<PAGE>   14

SPAWARSYSCEN - San Diego. Approximately $2.6 million in delivery orders have
been authorized under this contract through June 30, 2000, leaving an available
ceiling of approximately $12.5 million during the remaining 43 months of the
contract.

During the next twelve months, GreyStone's Commercial SBU expects to generate
revenues from the sale of its new Commercial entertainment product, the Mercury
motion base platform featuring the XSG game. The Commercial SBU may incur
additional losses during the next twelve months as it introduces its new
entertainment products to the market.

Cost of revenues increased to $423,502 for the current quarter compared to
$226,844 for the first quarter of the previous year. As a percentage of
revenues, costs of revenues were 78% in the current quarter compared to 49% for
the comparable quarter in the previous year. Cost of revenues increased in the
current quarter over the previous year's quarter due to an increase in purchased
engineering services costs in support of new contractual work and an increase in
the use of subcontractors for new work. Additionally, direct travel costs were
higher as a result of GreyStone's support of overseas military experiments. The
components that make up the cost of revenues include burdened labor, direct
travel, other direct costs, direct material, subcontracts and applicable SBU
burden. These cost components can vary significantly in amount from period to
period and are highly dependent on such factors as the nature of the work
performed, location and duration of the work (company vs. contractor site), who
performed the work (company personnel vs. subcontractors) and who provided any
required equipment (company vs. customer).

Marketing and sales expenses were $258,732 or 48% of revenues in the current
quarter compared to $166,511 or 36% of revenues for like quarter in the previous
year, an increase of $92,221. The increase in marketing and sales expenses was
due to the greater level of marketing effort of the Government SBU in support of
RAGE(TM), the Company's real-time visualization software product and related
engineering services. Marketing and sales expenses result from bid and proposal
activity as well as attendance at trade shows, company product demonstrations
and in-house marketing related activities such as product brochures and
marketing software development. Marketing and sales expenses will vary from
period to period as they depend highly upon the extent and manner in which the
company alters its efforts regarding potential contract opportunities during the
reporting period.

Research and development expenses increased to $340,358 for the current year's
quarter compared to $237,302 for the previous year's quarter. The increase is in
the Commercial SBU and reflects work on a new motion base for the Mercury based
entertainment system, creating a new title for play on the Mercury system and
developing a 3D Virtual Info-Space(TM) environment.

General and administrative expenses increased to $981,364 compared to $515,968
for the previous year's quarter, an increase of $465,396. Of the $465,396
increase, $326,289 was a non-cash compensation expense increase associated with
the issuance of warrants and compensatory stock options. The remainder of the
increase was for consulting fees and public relations expenses.

<PAGE>   15

Other income of $27,407 consisted of interest income, including $14,553 of
interest income from related parties' notes. Interest expense declined by $7,182
and was primarily the result of the conversion into stock of notes payable to
the principal stockholder.

The net loss of $1,436,505 increased by $742,268 or 107% from the $694,237 net
loss reported in the previous years first quarter. In summary, during the
current year, revenues were up by $80,474 or 18%. Total expenses and other
income (expense), increased by $822,742 or 71%.

GreyStone has previously cautioned that quarterly revenues and operating results
vary significantly and that period-to-period comparisons of its revenues and
operating results are not necessarily meaningful and should not be relied upon
as indications of future performance.

INVESTMENTS AND CAPITAL RESOURCES

On January 14, 2000, GreyStone executed a letter of intent for the acquisition
of a company that designs, builds, and sells forensic surveillance, mobile
intelligence, and communications platforms on a customized contract basis
primarily for domestic and international customers in law enforcement,
intelligence and military services. At the time of the filing of this report the
two companies are in discussions concerning the details of the form of
relationship. The transaction would allow GreyStone to use and expand our core
technologies and record revenues from the sale of products to a broad new
spectrum of customers. Our two companies have teamed for the recent submittal of
a proposal for forensic vehicles and command and control systems for a national
security agency in South America.

In support of the developing relationship between GreyStone and the target
company, GreyStone loaned the president (who is the sole shareholder) of the
company $500,000 in November 1999 and an additional $100,000 in February 2000.
The loans were originally due February 20, 2000. The maturity date of the loans
was extended to May 20, 2000 and subsequently extended to August 20, 2000. The
loans are collateralized by all of the borrower's stock in the target company.
In June 2000 GreyStone purchased forensic vehicle equipment from the target
company in the amount of $330,000 and paid the company $135,000 for the right to
receive future payment on invoices to be generated by the target company upon
the completion of work in progress. Until the business combination is complete,
GreyStone may elect in its sole discretion to provide more money to the target
company in an amount of approximately $500,000 during the remainder of the
business year ending March 31, 2001.

LIQUIDITY

GreyStone has incurred losses in each fiscal year since 1993, and as of June 30,
2000, GreyStone had an accumulated deficit of $43,594,204. To finance its
business plan and historic negative cash flow, GreyStone has continually needed
to obtain debt and equity financing on a private basis and to satisfy creditors
with stock rather than by payment in

<PAGE>   16

cash to enable it to develop its products. These losses have been primarily due
to lack of any significant entertainment revenues, substantial research and
development program expenses for Commercial and Government business units, and
other costs incurred for the development and introduction of GreyStone's
products. Almost all of GreyStone's sales have been in the government business
area, which provides low profit margins from which GreyStone has not been able
to recover the costs of its research and development programs. Although revenues
are expected from the sale of entertainment products, GreyStone is likely to
incur additional losses as it continues to market and develop its products. No
assurance can be given that GreyStone will ever derive material revenues from
entertainment products or that sale of its products will ever be profitable.

Net cash used in operating activities for the three months ended June 30, 2000
was $1,242,731, which was essentially unchanged from the $1,261,308 of cash used
for operating activities in the three months ended June 30, 1999. Although the
net loss for the quarter was $1,436,505, an increase of $742,268 from the
previous reporting quarter net loss amount of $694,237, non cash outlays for
depreciation and compensation expense in the current quarter were $454,939, as
compared to $133,877 in the previous quarter, an increase of $321,062.
Additionally, cash was used to reduce accounts payable and accrued expenses by
$433,467, increase other assets by $15,120 and accounts receivable decreased by
$171,735, while notes receivable interest increased by $14,553.

Net cash used in investing activities was $515,871 during the current three
month period compared to $33,646 for the same reporting period in business year
2000. In addition to the transactions with the acquisition candidate discussed
above, current period investing activities included purchases of software
licenses and equipment of $50,871.

Net cash provided by financing activities was $4,449,353 in the current period
compared to $2,159,715 for the previous comparable period. The $4,449,353 was
the net result of the sale on May 22, 2000 of $5,000,000 in convertible
preferred stock to a group of private investors and is net of a 10% commission
and legal fees. The net proceeds will be used by the Company for general
corporate purposes.

On May 22, 2000, the Company completed the sale of $5,000,000 in Series A
Convertible Preferred Stock to a group of private investors. The Company issued
5,000 shares of Series A Preferred Stock with a $1,000 liquidation preference
value, convertible immediately into common stock at a rate of the lower of (1)
250 shares of common stock per share of preferred stock (equivalent to an
investment of $4.00 per share of common stock issued) or (2) 80% of the volume
weighted average price for the previous 250,000 shares traded prior to
submission by the preferred stockholder of a conversion notice to the Company.
Embedded in the preferred stock is an optional feature allowing the investor to
convert to common stock immediately, as well as a mandatory conversion
requirement effective three years after the date of issuance. The Series A
investors also received warrants to purchase 1,250,000 shares of common stock at
an exercise price of $5.38 per share, and registration rights on the conversion
shares and the shares issuable upon the exercise of the warrants. The preferred
stock provides for a cumulative dividend of 8% per year, payable in common stock
or cash. After payment of a 10% commission for introducing the investors to the
Company, and legal fees totaling approximately $50,000,

<PAGE>   17

the Company received net proceeds of approximately $4,449,000 which it intends
to use for general corporate purposes. In accordance with the FASB's Emerging
Issues Task Force (EITF) Issue No 98-5, the Company recognized a beneficial
conversion feature in the amount of $804,103 as a one-time non-cash preferred
stock dividend. The amount represented the difference between the initial
conversion price at the date of issuance of the preferred shares and the market
price of the common stock at that date. In addition, the Company recognized a
one-time imputed (non-cash) preferred stock dividend of $3,437,500 representing
the fair value of the warrants issued in connection with the sale of the
preferred stock, as determined by the Black-Scholes model.

In connection with the above sale of convertible preferred stock, the Company
issued warrants to purchase 75,000 shares of common stock at an exercise price
of $5.38 per share to the party who introduced the Company to the Series A
private placement group. As a result, the Company recorded a one-time (non-cash)
preferred stock dividend of $207,750.

The aforementioned imputed dividends associated with issuing the stock resulted
in a one-time non-cash loss applicable to common stockholders of $(0.27) per
share. The Company also recorded a non-cash preferred stock dividend of $43,835
for the three month period ended June 30, 2000 for the 8% cumulative preferred
stock dividend feature.

At June 30, 2000, the Company had $2,858,050 in cash and cash equivalents, as
compared to $167,299 for the fiscal year ended March 31, 2000. Management
anticipates that in the future it will need to continue to obtain debt or equity
financing and, if GreyStone is unable to generate significant sales, then
GreyStone faces the risk of not having enough money or other resources to
continue to operate its current business plan. If additional money is needed and
is not available, then GreyStone could be forced to curtail product development
and the expansion of its operations.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Not Applicable

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

As of the date of this report, we are not a party to any legal proceedings that
are expected, individually, or in the aggregate, to have a material adverse
effect on our business, financial condition or operating results.

Pending legal proceedings which arose during the reporting period have been
previously reported on GreyStone's Annual Report on Form 10-K for the year ended
March 31, 2000, filed on June 29, 2000.

<PAGE>   18

ITEM 2. CHANGES IN SECURITIES AND USE OF PROCEEDS

Changes in securities which occurred during the reporting period have been
previously reported on Registrant's Annual Report on Form 10-K for the year
ended March 31, 2000, filed on June 29, 2000.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not Applicable

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

Not Applicable

ITEM 5. OTHER INFORMATION

Not applicable.

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

(a)     Exhibits

<TABLE>
<CAPTION>
        Exhibit No.                     Exhibit
        -----------                     -------
<S>                                     <C>
        27.0                            Financial Data Schedule
</TABLE>

(b)     Reports in Form 8-K

        During the three months ended June 30, 2000, the Company filed no
        reports on Form 8-K.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                        GreyStone Digital Technology, Inc.

                                        /s/ MARSHALL GELLER
                                        ----------------------------------
                                        Marshall Geller
                                        Chief Financial Officer

Dated: November 28, 2000

<PAGE>   19


                                  EXHIBIT INDEX


<TABLE>
<CAPTION>
Exhibit No.                Exhibit
-----------                -------
<S>                        <C>
27.0                       Financial Data Schedule
</TABLE>