Document:

SUBSCRIPTION AGREEMENT

THE  INVESTOR IS REQUIRED TO MARK BOXES TO INDICATE  WHICH  REPRESENTATIONS  AND
WARRANTIES IT IS MAKING UNDER PART 1 HEREOF.

Ladies and Gentlemen:

     By executing this Subscription Agreement,  the undersigned (the "Investor")
hereby  irrevocably  subscribes  for the  number of  shares  (the  "Shares")  of
RAINWIRE  PARTNERS,  INC., a Delaware  Corporation (the "Company") listed on the
signature  page  hereto  at  a  subscription   price  of  $1.25  per  share.  In
satisfaction  of a portion of a Promissory  Note with Company,  the Investor has
delivered  herewith to the Company such  Promissory Note as payment of the Total
Purchase Price as set forth on the signature page hereto.

     This  Subscription  Agreement shall not be valid and binding on the Company
unless and until accepted by the Company. If this Subscription  Agreement is not
accepted by the Company,  the purchase price paid by the Investor to the Company
shall be refunded to the Investor.

     The Investor  understands that the Shares may be acquired hereunder only by
investors who are able to make all required representations and warranties under
Part I and Part II below.

                         REPRESENTATIONS AND WARRANTIES

     The Investor  makes  representations  and  warranties in this  Subscription
Agreement in order to permit the Company to  determine  the  suitability  of the
Shares as an investment  for the Investor and to determine the  availability  of
the exemptions relied upon by the Company from  registration  under Section 5 of
the United  States  Securities  Act of 1933,  as  amended,  and the  regulations
promulgated thereunder (the "Securities Act").

Part I:  Representations as to Accredited Investor Status

     TO ESTABLISH  THAT THE INVESTOR IS AN  "ACCREDITED  INVESTOR" AS DEFINED IN
RULE 501(a)  PROMULGATED  UNDER THE  SECURITIES  ACT, THE INVESTOR  MUST MARK AT
LEAST ONE BOX BELOW,  THEREBY  MAKING THE  REPRESENTATION  SET FORTH  BESIDE THE
MARKED BOX.

|_|  The Investor is a natural person whose  individual net worth,  or joint net
     worth with that person's  spouse,  at the time of the  Investor's  purchase
     exceeds $1,000,000.

|_|  The Investor is a natural person who had an individual  income in excess of
     $200,000  in each of the two most  recent  years or joint  income with that
     person's  spouse  in excess of  $300,000  in each of those  years and has a
     reasonable  expectation  of reaching  the same income  level in the current
     year.

|_|  The Investor is a bank as defined in  Section 3(a)(2) of the Securities Act
     or a savings and loan  association  or any other  institution as defined in
     Section 3(a)(5)(A) of the Securities Act.

|_|  The Investor is a broker  dealer  registered  pursuant to Section 15 of the
     United States Securities Exchange Act of 1934, as amended.

|_|  The Investor is an insurance  company as defined in  Section(2)(13)  of the
     Securities Act.

|_|  The  Investor is an  investment  company  registered  under the  Investment
     Company   Act  or  a   business   development   company   as   defined   in
     Section 2(a)(48) of that Act.

|_|  The Investor is a Small Business  Investment  Company  licensed by the U.S.
     Small Business Administration under Section 301(c) or (d) of the U.S. Small
     Business Investment Act of 1958, as amended.

|_|  The Investor is a plan  established  and  maintained  by a state within the
     United States,  one or more political  subdivisions of such a state, or any
     agency or  instrumentality  of such a state or its political  subdivisions,
     for  the  benefit  of  its  employees,  with  total  assets  in  excess  of
     $5,000,000.

|_|  The  Investor  is an employee  benefit  plan within the meaning of the U.S.
     employee  Retirement  Income  Security Act of 1974,  as amended  ("ERISA"),
     (i) the  investment  decision  for  which is made by a plan  fiduciary,  as
     defined in Section 3(21) of ERISA, which is either a bank, savings and loan
     association,   insurance  company,  or  registered  investment  advisor  or
     (ii) which  has total assets in excess of  $5,000,000 or  (iii) which  is a
     self-directed  plan with  investment  decisions made solely by persons that
     are Accredited Investors.

|_|  The  Investor  is a private  business  development  company  as  defined in
     Section 202(a)(22) of the U.S. Investment Advisers Act of 1940.

|_|  The Investor is an organization that is described in  Section 501(c)(3)  of
     the U.S.  Internal  Revenue  Code of 1986,  as amended,  a  corporation,  a
     Massachusetts or similar business trust, or a partnership, in any case that
     was not formed for the specific purpose of acquiring the Shares, with total
     assets in excess of $5,000,000.

|_|  The Investor is a director or executive  officer (as defined in Rule 502(f)
     promulgated under the Securities Act) of the Company.

|_|  The Investor is a trust with total assets of $5,000,000, not formed for the
     specific  purpose of acquiring the Shares,  whose purchase is directed by a
     sophisticated person as described in  Rule 506(b)(2)(ii)  promulgated under
     the Securities Act.

|x|  The Investor is an entity in which all of the equity owners are  Accredited
     Investors.

PART II.  Additional Representations

THE INVESTOR,  BY SIGNING THIS  SUBSCRIPTION  AGREEMENT,  WILL BE DEEMED TO HAVE
MADE ALL  REPRESENTATIONS  AND WARRANTIES  CONTAINED IN PARAGRAPHS 1  THROUGH 11
BELOW.

1.   The Investor and/or the Investor's  representative (if any) have received a
     copy of all of the public filings of the Company pursuant to the Securities
     Exchange  Act of 1934  together  with  current  information  regarding  the
     Company's wholly owned subsidiary.  The Investor,  either alone or together
     with the Investor's purchaser  representative,  if any, have such knowledge
     and experience in financial and business  matters as to be able to evaluate
     the merits and risks of an investment in the Company.

2.   The Investor  acknowledges  that:  (a) the  Investor has been provided with
     information  concerning  the  company  and  has had an  opportunity  to ask
     questions and to obtain such additional  information concerning the Company
     as  the  Investor  deems   necessary  in  connection  with  the  Investor's
     acquisition  of interests in the Company;  (b) information  with respect to
     existing  business  and  historical  operating  results of the  Company and
     estimates  and  projections  as to future  operations  involve  significant
     subjective judgment and analysis,  which may or may not be correct; (c) the
     Company cannot, and does not, make any representation or warranty as to the
     accuracy of the  information  concerning  the past or future results of the
     Company.

3.   The  Investor  has  sought  such  accounting,  legal and tax  advice as the
     Investor considered necessary to make an informed investment decision.  The
     Investor is  experienced  in investment  and business  matters (or has been
     advised by an investment  advisor who is so  experienced),  and is aware of
     and can afford the risks of making such an  investment,  including the risk
     of losing the Investor's entire investment.

4.   The Shares  subscribed  for herein will be  acquired  solely by and for the
     account of the  Investor for  investment  and are not being  purchased  for
     resale  or  distribution.  The  Investor  has  no  contract,   undertaking,
     agreement or arrangement with any person to sell or transfer to such person
     or anyone  else any of the  Shares  (or any  portion  thereof  or  interest
     therein) for which the Investor hereby subscribes,  and the investor has no
     present plans or intentions to enter into any such  contract,  undertaking,
     agreement or arrangement.  The financial  condition of the Investor is such
     that the Investor has no need for liquidity  with respect to the Investor's
     investment  in the  Shares  and no need to  dispose  of any  portion of the
     Shares to satisfy any existing or contemplated undertaking or indebtedness;
     and the overall  commitment  by the Investor to  investments  which are not
     readily marketable is not  disproportionate to the Investor's net worth and
     will not become excessive as a result of investment in the Shares.

5.   The  Investor  acknowledges  that the  Company  has  agreed to  afford  the
     Investor  Piggyback  rights,  exclusive  of  registrations  on  Form S-4 or
     Form S-8,  and that the  Company  has agreed to enter  into a  Registration
     Rights Agreement with Investor if Company is unable to register  Investor's
     shares by November 30, 2000.

6.   The  Investor  understands,   represents,  warrants  and  agrees  that  the
     Investor's  Shares  are not  transferable,  that  the  Investor  will  not,
     directly or  indirectly,  sell,  assign,  convey,  hypothecate or otherwise
     transfer the Investor's Shares (or any portion thereof or interest therein)
     except in accordance with Securities Act of 1933 and other applicable state
     securities  laws  and that  violation  of the  foregoing  will  cause  such
     transfer to be void and need not be recognized by the Company.

7.   The Investor  warrants that the Investor has  knowledge  and  experience in
     financial, investment and business matters and that the Investor is capable
     of evaluating the merits and risks of an investment in the Shares.

8.   The Company,  by and through its Board of Directors  and/or legal  counsel,
     has  made  no  representation  or  warranty  as to the  suitability  of the
     Investor's  investment  in the Shares.  Neither the Company nor its counsel
     has made an independent  investigation  on behalf of the Investor,  nor has
     the Company, by and through its Board of Directors or counsel,  acted in an
     advisory capacity to the Investor.

9.   The Investor has relied solely upon independent  investigations made by the
     Investor  in making the  decision  to purchase  the Shares  subscribed  for
     herein,  and acknowledges that no  representations  or agreements have been
     made to the Investor with respect thereto.

10.  The Investor expressly acknowledges that:

     (a)  No  federal,  state or other  governmental  agency has passed upon the
          adequacy or accuracy or the information concerning the Company or made
          any finding or determination as to the fairness of the investment,  or
          any recommendation or endorsement of the Shares as an investment.

     (b)  The Investor is not dependent  upon a current cash return with respect
          to  the  Investor's   investment  in  the  Shares,  and  the  Investor
          understands  that  distributions  are not required to be made and that
          returns on an investment in the Shares may not be realized for years.

     (c)  The  Shares  are  being  offered  and sold to  prospective  purchasers
          directly,  and neither the Company nor any person  acting on behalf of
          the Company has offered to sell the Shares to the Investor by means of
          any  form of  general  solicitation  or  advertising,  such  as  media
          advertising or public seminars.

11.  The Investor (i) if an  individual,  is at least 21 years of age; (ii) if a
     partnership,  is comprised of partners all of whom are at least 21 years of
     age; and (iii) if a corporation,  partnership,  trust or other like entity,
     is authorized and otherwise duly qualified to purchase and hold the Shares.
     The Investor has duly authorized,  executed and delivered this Subscription
     Agreement and understands  that the Company is not obligated to accept this
     Subscription  Agreement  and that  this  Subscription  shall  be valid  and
     binding on the Company only upon  acceptance  by the Company.  The Investor
     understands that if this Subscription Agreement is accepted and executed by
     the Company,  the  Investor  will  constitute  a valid and legally  binding
     obligation of the Investor and the Company.

12.  The Investor  certifies  under penalties of perjury that (i) the Investor's
     taxpayer  identification  number (social  security number for an individual
     Investor) as set forth on the  signature  page hereof is correct;  (ii) the
     Investor's  home address (in the case of an  individual)  or office address
     (in the case of an entity)  as set forth on the  signature  page  hereof is
     correct; and (iii) the Investor is not subject to backup withholding either
     because the Investor has not been notified by the Internal  Revenue Service
     ("IRS") that the Investor is subject to backup withholding as a result of a
     failure to report all  interest or  dividends,  or because the Investor has
     been  notified by the IRS that the Investor is no longer  subject to backup
     withholding.  If the  Investor is subject to backup  withholding,  Investor
     should cross through clause (iii) and check the following box:[  ]

                                  MISCELLANEOUS

1.   Successors and Assigns.  Upon acceptance by the Company,  this Subscription
     Agreement, and all of the obligations of the Investor hereunder, and all of
     the representations and warranties by the Investor herein, shall be binding
     upon  the  heirs,  executors,  administrators,   personal  representatives,
     successors and assigns of the Investor.

2.   Governing Law. This Subscription Agreement shall be construed in accordance
     with, and governed in all respects by, the laws of the State of Georgia.

3.   Indemnification. The Investor agrees to indemnify the Company, its officers
     and managers for any and all claims or losses  (including  attorneys' fees)
     incurred  by  them  as a  result  of the  incorrectness  of the  Investor's
     representations and warranties contained herein,  including but not limited
     to, claims arising under federal and state  securities  laws and common law
     claims.

                  [Remainder of page intentionally left blank]

                                SIGNATURE PAGE TO
                           SUBSCRIPTION AGREEMENT FOR

Executed at  Norcross,   GA   this 3rd day of August , 2000.
             CITY      STATE

              THE INVESTOR:
              Structured Data Systems, Inc.
              -----------------------------
               Please  print or type legal name of Investor as it should  appear
               on stock certificate and in stockholder records

              By: /s/ Robert Y. Duke
              ----------------------
              Sign here
              Its:  President
               If signatory is executing on behalf of an entity, please indicate
               signatory's title or office with such entity

              Number of Shares of    Rainwire Partners, Inc. Stock
              Subscribed for:   120,000

              Price Per Share:  $ 1.25
              Total Purchase Price: $150,000
              Taxpayer I.D. Number or Social Security Number: 58-1635498

               Print or type address,  telephone number and fax number preferred
               for stockholder communications:

              Address:  4940 Peachtree Industrial Blvd.
                        Suite 370
                        Norcross, GA 30071
              Telephone: 770-447-0096
              Fax:       770-447-0174

Accepted this 3rd  day of
 August, 2000
/s/ Bryan M. Johns
------------------
By:Bryan M. Johns
Title: President / CEO

* If the Investor is a corporation,  trust, partnership, or other entity, please
attach a copy of the resolutions,  trust  instrument,  partnership  agreement or
similar  document  (or in lieu  thereof,  an opinion  of  counsel)  showing  the
corporation,  trust,  partnership  or other entity has authority to purchase the
Shares and showing that the signatory above may act on its behalf in making this
investment.THIS WARRANT HAS NOT BEEN REGISTERED  UNDER THE SECURITIES
            ACT OF 1933, AS AMENDED OR ANY STATE  SECURITIES  LAWS. NO
            SALE OR DISPOSITION MAY BE EFFECTED  WITHOUT (i) EFFECTIVE
            REGISTRATION  STATEMENTS RELATED THERETO,  (ii) AN OPINION
            OF COUNSEL OR OTHER EVIDENCE,  REASONABLY  SATISFACTORY TO
            THE COMPANY,  THAT SUCH  REGISTRATIONS  ARE NOT  REQUIRED,
            (iii)  RECEIPT OF NO-ACTION  LETTERS FROM THE  APPROPRIATE
            GOVERNMENTAL AUTHORITIES, OR (iv) OTHERWISE COMPLYING WITH
            THE PROVISIONS OF SECTION 7 OF THIS WARRANT.

                              INFOCAST CORPORATION

                       WARRANT TO PURCHASE 397.957 SHARES
                                 OF COMMON STOCK

         THIS  CERTIFIES  THAT,  for  value  received,  SUN  MICROSYSTEMS,  INC.
("Holder")  and its assigns are entitled to subscribe  for and purchase  397,957
shares of the fully paid and nonassessable Common Stock (as adjusted pursuant to
Section 4 hereof,  the "Shares") of INFOCAST  CORPORATION,  a Nevada corporation
(the "Company"), at a price equal to the lesser of (i) the average closing price
as reported on the OTC Bulletin Board of the Common Stock of the Company for the
10 trading days prior to the First  Closing Date, as such term is defined in the
Stock  Purchase  Agreement  between the Company and Holder  dated as of the date
hereof  and (ii) the  closing  price of the Common  Stock of the  Company on the
trading day immediately  preceding the First Closing Date as reported on the OTC
Bulletin  Board (such price and such other price as shall  result,  from time to
time, from the  adjustments  specified in Section 4 hereof is herein referred to
as the  "Warrant  Price"),  subject  to the  provisions  and upon the  terms and
conditions  hereinafter set forth. As used herein,  (a) the term "Date of Grant"
shall mean September 14, 2000, and (b) the term "Other  Warrants" shall mean any
other warrants  issued by the Company in connection  with the  transaction  with
respect to which this Warrant was issued,  and any warrant  issued upon transfer
or partial exercise of this Warrant.  The term "Warrant" as used herein shall be
deemed to include Other Warrants unless the context clearly requires otherwise.

         1.     Exercisability; Term.

                (a) The purchase rights represented by this Warrant shall become
exercisable, if at all, only as set forth in this Section 1(a):

                    (i) purchase rights for 109,029 shares of Common Stock shall
be immediately exercisable as of the date hereof;

                    (ii) immediately  upon (A) the Company's  written request to
Holder for the extension of an additional $2,000,000 of credit (for an aggregate
of $4,000,000 of credit) under the Company's line of credit with Holder pursuant
to the Term Sheet  dated as of the date

<PAGE>

hereof (the  "Loan") and (B)  Holder's  authorization  of the  extension of such
additional  $2,000,000,  purchase  rights for an  additional  109,029  shares of
Common  Stock  (for  an  aggregate  of  218,058  shares)  shall  be  immediately
exercisable;

                    (iii)  immediately upon (A) the Company's written request to
Holder for the extension of an additional $2,000,000 of credit (for an aggregate
of $6,000,000 of credit)  under the Loan and (B) Holder's  authorization  of the
extension  of such  additional  $2,000,000,  purchase  rights for an  additional
109,029  shares (for an  aggregate  of 327,087  shares) of Common Stock shall be
immediately exercisable; and

                    (iv) immediately  upon (A) the Company's  written request to
Holder for the extension of an additional $1,300,000 of credit (for an aggregate
of $7,300,000 of credit)  under the Loan and (B) Holder's  authorization  of the
extension  of such  additional  $1,300,000,  purchase  rights for an  additional
70,870  shares (for an  aggregate  of 397,957  shares) of Common  Stock shall be
immediately exercisable.

                (b)  All  purchase  rights  represented  by this  Warrant  shall
terminate five (5) years after the Date of Grant.

         2. Method of Exercise;  Payment;  Issuance of New  Warrant.  Subject to
Section  1  hereof,  the  purchase  right  represented  by this  Warrant  may be
exercised by the holder  hereof,  in whole or in part and from time to time,  at
the election of the holder  hereof,  by (a) the  surrender of this Warrant (with
the notice of exercise  substantially in the form attached hereto as Exhibit A-1
duly  completed and executed) at the principal  office of the Company and by the
payment to the Company,  by certified or bank check,  or by wire  transfer to an
account  designated by the Company (a "Wire Transfer") of an amount equal to the
then  applicable  Warrant  Price  multiplied  by the number of Shares then being
purchased,  or (b) if in  connection  with a registered  public  offering of the
Company's securities, the surrender of this Warrant (with the notice of exercise
form  attached  hereto  as  Exhibit  A-2 duly  completed  and  executed)  at the
principal office of the Company together with notice of arrangements  reasonably
satisfactory  to the Company for payment to the Company  either by  certified or
bank check or by Wire  Transfer  from the  proceeds  of the sale of shares to be
sold by the  holder  in such  public  offering  of an  amount  equal to the then
applicable Warrant Price per share multiplied by the number of Shares then being
purchased or (c) exercise of the "net  issuance"  right  provided for in Section
10.2  hereof.  The  person  or  persons  in  whose  name(s)  any  certificate(s)
representing the Shares shall be issuable upon exercise of this Warrant shall be
deemed to have become the  holder(s)  of record of, and shall be treated for all
purposes as the record  holder(s) of, the shares  represented  thereby (and such
shares  shall be deemed to have been issued)  immediately  prior to the close of
business on the date or dates upon which this Warrant is exercised. In the event
of any exercise of the rights represented by this Warrant,  certificates for the
shares of stock so purchased  shall be delivered to the holder hereof as soon as
practicable  and, if requested by the holder of this Warrant,  the Company shall
cause its transfer agent to deliver the certificate  representing  Shares issued
upon  exercise of this  Warrant to a broker or other  person (as directed by the
holder  exercising  this Warrant)  within the time period required to settle any
trade made by the holder after exercise of this Warrant.

                                      -2-

<PAGE>

         3. Stock  Fully  Paid;  Reservation  of Shares.  All Shares that may be
issued upon the exercise of the rights  represented  by this Warrant will,  upon
issuance  pursuant  to the  terms  and  conditions  herein,  be  fully  paid and
nonassessable,  and free from all taxes,  liens and charges  with respect to the
issue  thereof.  During the period within which the rights  represented  by this
Warrant may be  exercised,  the Company will at all times have  authorized,  and
reserved  for the  purpose of the issue upon  exercise  of the  purchase  rights
evidenced by this Warrant,  a sufficient number of shares of its Common Stock to
provide for the exercise of the rights represented by this Warrant.

         4.  Adjustment  of Warrant  Price and Number of Shares.  The number and
kind of securities purchasable upon the exercise of this Warrant and the Warrant
Price shall be subject to  adjustment  from time to time upon the  occurrence of
certain events, as follows:

             (a)  Reclassification or Merger. In case of any reclassification or
change of securities of the class  issuable upon exercise of this Warrant (other
than a change in par value,  or from par value to no par  value,  or from no par
value to par value, or as a result of a subdivision or combination),  or in case
of any merger of the  Company  with or into  another  corporation  (other than a
merger with another  corporation  in which the Company is the  acquiring and the
surviving  corporation  and which  does not  result in any  reclassification  or
change of outstanding  securities issuable upon exercise of this Warrant), or in
case of any sale of all or substantially  all of the assets of the Company,  the
Company, or such successor or purchasing corporation,  as the case may be, shall
duly  execute and  deliver to the holder of this  Warrant a new Warrant (in form
and substance  satisfactory to the holder of this Warrant), or the Company shall
make appropriate  provision  without the issuance of a new Warrant,  so that the
holder of this  Warrant  shall have the right to receive  upon  exercise of this
Warrant,  at a total purchase price not to exceed that payable upon the exercise
of the unexercised portion of this Warrant,  and in lieu of the shares of Common
Stock theretofore issuable upon exercise of this Warrant, the kind and amount of
shares of stock,  other  securities,  money and  property  receivable  upon such
reclassification, change or merger by a holder of the number of shares of Common
Stock then  purchasable  under this Warrant.  Such new Warrant shall provide for
adjustments  that shall be as nearly  equivalent  as may be  practicable  to the
adjustments  provided for in this Section 4. The provisions of this subparagraph
(a) shall similarly apply to successive reclassifications,  changes, mergers and
transfers.

             (b)  Subdivision or  Combination  of Shares.  If the Company at any
time while this Warrant  remains  outstanding  and unexpired  shall subdivide or
combine its  outstanding  shares of Common  Stock,  the  Warrant  Price shall be
proportionately  decreased and the number of Shares issuable  hereunder shall be
proportionately  increased in the case of a  subdivision  and the Warrant  Price
shall be  proportionately  increased and the number of Shares issuable hereunder
shall be proportionately decreased in the case of a combination.

             (c) Stock Dividends and Other Distributions.  If the Company at any
time while this Warrant is  outstanding  and unexpired  shall (i) pay a dividend
with respect to its Common Stock payable in Common Stock, then the Warrant Price
shall be  adjusted,  from and after the date of  determination  of  shareholders
entitled to receive such dividend or  distribution,  to that price determined by
multiplying  the  Warrant  Price in  effect  immediately  prior to such  date of

                                      -3-

<PAGE>

determination by a fraction (A) the numerator of which shall be the total number
of shares of Common  Stock  outstanding  immediately  prior to such  dividend or
distribution,  and (B) the  denominator  of which  shall be the total  number of
shares  of  Common  Stock   outstanding   immediately  after  such  dividend  or
distribution;  or (ii) make any other  distribution with respect to Common Stock
other than cash dividends (except any distribution  specifically provided for in
Sections 4(a) and 4(b)), then, in each such case, provision shall be made by the
Company such that the holder of this Warrant shall receive upon exercise of this
Warrant a proportionate  share of any such dividend or distribution as though it
were the holder of the Shares as of the record date fixed for the  determination
of the  shareholders  of the  Company  entitled  to  receive  such  dividend  or
distribution.

             (d)  Adjustment  of Number of Shares.  Upon each  adjustment in the
Warrant Price, the number of Shares purchasable  hereunder shall be adjusted, to
the nearest whole share,  to the product  obtained by multiplying  the number of
Shares purchasable  immediately prior to such adjustment in the Warrant Price by
a fraction,  the numerator of which shall be the Warrant Price immediately prior
to such  adjustment  and the  denominator  of which shall be the  Warrant  Price
immediately thereafter.

         5. Notice of  Adjustments.  Whenever the Warrant Price or the number of
Shares purchasable hereunder shall be adjusted pursuant to Section 4 hereof, the
Company shall make a certificate  signed by its chief financial  officer setting
forth, in reasonable detail,  the event requiring the adjustment,  the amount of
the  adjustment,  the method by which such  adjustment was  calculated,  and the
Warrant Price and the number of Shares purchasable hereunder after giving effect
to such  adjustment,  and shall cause  copies of such  certificate  to be mailed
(without regard to Section 13 hereof,  by first class mail,  postage prepaid) to
the holder of this Warrant at such holder's last known address.

         6.  Fractional  Shares.  No  fractional  shares of Common Stock will be
issued in connection with any exercise hereunder, but in lieu of such fractional
shares the Company shall make a cash payment  therefor  based on the fair market
value of the Common Stock on the date of exercise as  reasonably  determined  in
good faith by the Company's Board of Directors.

         7. Compliance with Securities Act;  Disposition of Warrant or Shares of
Common Stock.

             (a) Compliance with Securities Act. The holder of this Warrant,  by
acceptance  hereof,  agrees that this Warrant,  and the Shares to be issued upon
exercise  hereof are being acquired for investment and that such holder will not
offer,  sell or otherwise  dispose of this  Warrant,  or any Shares except under
circumstances  which will not result in a  violation  of the  Securities  Act of
1933,  as amended (the "Act") or any  applicable  state  securities  laws.  Upon
exercise of this Warrant,  unless the Shares being acquired are registered under
the Act and any  applicable  state  securities  laws or an  exemption  from such
registration  is available,  the holder hereof shall confirm in writing that the
Shares so purchased are being acquired for investment and not with a view toward
distribution  or resale in  violation  of the Act and shall  confirm  such other
matters  related  thereto as may be  reasonably  requested by the Company.  This
Warrant and all

                                      -4-

<PAGE>

Shares issued upon exercise of this Warrant (unless registered under the Act and
any  applicable  state  securities  laws) shall be stamped or  imprinted  with a
legend in substantially the following form:

            "THE SECURITIES  EVIDENCED HEREBY HAVE NOT BEEN REGISTERED
            UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE
            SECURITIES  LAWS. NO SALE OR  DISPOSITION  MAY BE EFFECTED
            WITHOUT  (i)  EFFECTIVE  REGISTRATION  STATEMENTS  RELATED
            THERETO,  (ii) AN OPINION  OF  COUNSEL OR OTHER  EVIDENCE,
            REASONABLY   SATISFACTORY   TO  THE  COMPANY,   THAT  SUCH
            REGISTRATIONS ARE NOT REQUIRED, (iii) RECEIPT OF NO-ACTION
            LETTERS FROM THE APPROPRIATE GOVERNMENTAL AUTHORITIES,  OR
            (iv) OTHERWISE  COMPLYING WITH THE PROVISIONS OF SECTION 7
            OF THE WARRANT UNDER WHICH THESE  SECURITIES  WERE ISSUED,
            DIRECTLY OR INDIRECTLY."

            Said legend shall be removed by the  Company,  upon the request of a
holder,  at such time as the  restrictions  on the  transfer  of the  applicable
security shall have terminated.  In addition, in connection with the issuance of
this Warrant, the holder specifically represents to the Company by acceptance of
this Warrant as follows:

                    (1) The holder is aware of the  Company's  business  affairs
and  financial  condition,  and  has  acquired  information  about  the  Company
sufficient  to reach an informed  and  knowledgeable  decision  to acquire  this
Warrant. The holder is acquiring this Warrant for its own account for investment
purposes only and not with a view to, or for the resale in connection  with, any
"distribution" thereof in violation of the Act.

                    (2) The holder  understands  that this  Warrant has not been
registered under the Act in reliance upon a specific exemption therefrom,  which
exemption depends upon, among other things, the bona fide nature of the holder's
investment intent as expressed herein.

                    (3) The holder further understands that this Warrant must be
held  indefinitely  unless  subsequently  registered under the Act and qualified
under  any  applicable  state   securities  laws,  or  unless   exemptions  from
registration and qualification are otherwise  available.  The holder is aware of
the provisions of Rule 144, promulgated under the Act.

                    (4) The holder is an  "accredited  investor" as such term is
defined in Rule 501 of Regulation D promulgated under the Act.

             (b)  Disposition  of Warrant or Shares.  With respect to any offer,
sale or other disposition of this Warrant or any Shares acquired pursuant to the
exercise of this Warrant prior to  registration  of such Warrant or Shares,  the
holder  hereof  agrees to give  written  notice to the  Company  prior  thereto,
describing  briefly the manner thereof,  together with a written opinion of such
holder's counsel, or other evidence, if reasonably  satisfactory to the Company,
to the effect

                                      -5-

<PAGE>

that such offer, sale or other disposition may be effected without  registration
or  qualification  (under  the Act as then in  effect  or any  federal  or state
securities  law then in  effect) of this  Warrant  or the Shares and  indicating
whether or not under the Act  certificates  for this Warrant or the Shares to be
sold or otherwise  disposed of require any  restrictive  legend as to applicable
restrictions  on  transferability  in order to ensure  compliance with such law.
Upon receiving such written notice and reasonably  satisfactory opinion or other
evidence, the Company, as promptly as practicable but no later than fifteen (15)
days after  receipt of the written  notice,  shall  notify such holder that such
holder may sell or  otherwise  dispose of this  Warrant or such  Shares,  all in
accordance  with  the  terms  of  the  notice  delivered  to the  Company.  If a
determination  has been made  pursuant to this  Section 7(b) that the opinion of
counsel for the holder or other evidence is not reasonably  satisfactory  to the
Company,  the Company shall so notify the holder  promptly with details  thereof
after such  determination  has been made.  Notwithstanding  the foregoing,  this
Warrant or such  Shares  may,  as to such  federal  laws,  be  offered,  sold or
otherwise  disposed  of in  accordance  with  Rule  144 or 144A  under  the Act,
provided that the Company shall have been furnished with such information as the
Company  may  reasonably  request to  provide a  reasonable  assurance  that the
provisions  of  Rule  144  or  144A  have  been  satisfied.   Each   certificate
representing  this  Warrant or the Shares  thus  transferred  (except a transfer
pursuant  to  Rule  144 or  144A)  shall  bear  a  legend  as to the  applicable
restrictions on  transferability  in order to ensure  compliance with such laws,
unless in the  aforesaid  opinion of counsel for the holder,  such legend is not
required  in order to ensure  compliance  with such laws.  The Company may issue
stop  transfer  instructions  to its  transfer  agent in  connection  with  such
restrictions.

             (c) Applicability of Restrictions.  Neither any restrictions of any
legend  described  in this  Warrant nor the  requirements  of Section 7(b) above
shall apply to any transfer or grant of a security interest in, this Warrant (or
the Common Stock  obtainable upon exercise  thereof) or any part hereof (i) to a
partner  of the  holder  if the  holder is a  partnership  or to a member of the
holder if the holder is a limited  liability  company,  (ii) to a partnership of
which the holder is a partner or a limited liability company of which the holder
is a  member,  or  (iii) to any  affiliate  of the  holder  if the  holder  is a
corporation;  provided,  however,  in any  such  transfer,  if  applicable,  the
transferee  shall on the  Company's  request agree in writing to be bound by the
terms of this Warrant as if an original holder hereof.

         8. Rights as Shareholders;  Information.  No holder of this Warrant, as
such, shall be entitled to vote or receive  dividends or be deemed the holder of
Common Stock or any other  securities which may at any time be issuable upon the
exercise  hereof  for any  purpose,  nor  shall  anything  contained  herein  be
construed to confer upon the holder of this Warrant,  as such, any of the rights
of a  shareholder  of the  Company  or any  right  to vote for the  election  of
directors or upon any matter  submitted to shareholders at any meeting  thereof,
or to receive notice of meetings, or to receive dividends or subscription rights
or  otherwise  until  this  Warrant  shall  have been  exercised  and the Shares
purchasable upon the exercise hereof shall have become deliverable,  as provided
herein.  Notwithstanding the foregoing,  the Company will transmit to the holder
of this  Warrant  such  information,  documents  and  reports  as are  generally
distributed  to the  holders  of any class or series  of the  securities  of the
Company concurrently with the distribution thereof to the shareholders.

                                      -6-

<PAGE>

         9. Registration  Rights.  Any Common Stock of the Company obtained upon
exercise hereof shall be deemed to be "Registrable  Securities"  under the terms
of the Registration Rights Agreement,  dated as of the date hereof,  between the
Company and Holder.

         10. Additional Rights.

         10.1 Mergers. The Company shall provide the holder of this Warrant with
at least twenty (20) days'  written  notice prior to the closing  thereof of the
terms and conditions of any of the following transactions:  (i) the sale, lease,
exchange,  conveyance or other  disposition of all or  substantially  all of the
Company's  property or business,  or (ii) its merger into or consolidation  with
any other corporation (other than a wholly-owned  subsidiary of the Company), or
any  transaction  (including  a merger  or other  reorganization)  or  series of
related transactions,  in which more than 50% of the voting power of the Company
is disposed of.

         10.2 Right to Convert Warrant into Stock: Net Issuance.

             (a) Right to  Convert.  In addition  to and  without  limiting  the
rights of the holder under the terms of this Warrant,  the holder shall have the
right to convert this Warrant or any portion  thereof (the  "Conversion  Right")
into shares of Common Stock as provided in this Section 10.2 at any time or from
time to time during the term of this Warrant.  Upon  exercise of the  Conversion
Right with respect to a particular number of shares subject to this Warrant (the
"Converted  Warrant  Shares"),  the Company shall deliver to the holder (without
payment by the holder of any exercise price or any cash or other  consideration)
that  number  of  shares  of fully  paid and  nonassessable  Common  Stock as is
determined according to the following formula:

            X =   B - A
                -------
                    Y

            Where:    X  =     the number of shares of Common  Stock that may be
                               issued to the holder

                      Y  =     the  fair  market  value of one  share of  Common
                               Stock

                      A  =     the  aggregate  Warrant  Price  of the  specified
                               number of Converted  Warrant  Shares  immediately
                               prior to the  exercise  of the  Conversion  Right
                               (i.e.,  the number of  Converted  Warrant  Shares
                               multiplied by the Warrant Price)

                      B  =     the aggregate  fair market value of the specified
                               number of converted  Warrant  Shares  (i.e.,  the
                               number of Converted  Warrant Shares multiplied by
                               the fair market  value of one  Converted  Warrant
                               Shares)

         No fractional  shares shall be issuable upon exercise of the Conversion
Right,  and, if the number of shares to be issued  determined in accordance with
the foregoing formula is other than a

                                      -7-

<PAGE>

whole number, the Company shall pay to the holder an amount in cash equal to the
fair market value of the resulting  fractional  share on the Conversion Date (as
hereinafter defined).  For purposes of Section 9 of this Warrant,  shares issued
pursuant  to the  Conversion  Right shall be treated as if they were issued upon
the exercise of this Warrant.

             (b) Method of Exercise.  The  Conversion  Right may be exercised by
the  holder by the  surrender  of this  Warrant at the  principal  office of the
Company  together with a written  statement (which may be in the form of Exhibit
A-1 or  Exhibit  A-2  hereto)  specifying  that the  holder  thereby  intends to
exercise the  Conversion  Right and  indicating  the number of shares subject to
this Warrant which are being surrendered  (referred to in Section 10.2(a) hereof
as the  Converted  Warrant  Shares) in exercise of the  Conversion  Right.  Such
conversion  shall be  effective  upon  receipt by the  Company  of this  Warrant
together  with the  aforesaid  written  statement,  or on such  later date as is
specified  therein (the "Conversion  Date"),  and, at the election of the holder
hereof,  may be made  contingent  upon the closing of the sale of the  Company's
Common  Stock to the  public in a public  offering  pursuant  to a  Registration
Statement  under the Act (a  "Public  Offering").  Certificates  for the  shares
issuable upon exercise of the Conversion Right and, if applicable, a new warrant
evidencing the balance of the shares remaining subject to this Warrant, shall be
issued as of the  Conversion  Date and shall be delivered  to the holder  within
thirty (30) days following the Conversion Date.

             (c)  Determination  of Fair  Market  Value.  For  purposes  of this
Section 10.2,  "fair market value" of a share of Common Stock as of a particular
date (the "Determination Date") shall mean:

                  (i) If the  Conversion  Right is exercised in connection  with
and  contingent  upon a  Public  Offering,  and if  the  Company's  Registration
Statement relating to such Public Offering  ("Registration  Statement") has been
declared effective by the Securities and Exchange  Commission,  then the initial
"Price  to  Public"  specified  in the final  prospectus  with  respect  to such
offering.

                  (ii) If the  Conversion  Right is not  exercised in connection
with and contingent upon a Public Offering, then as follows:

                        (A) If traded on a securities exchange,  the fair market
            value of the Common  Stock  shall be deemed to be the average of the
            closing  prices of the Common Stock on such  exchange  over the five
            trading days immediately prior to the Determination Date;

                        (B) If  traded  on the  Nasdaq  Stock  Market  or  other
            over-the-counter  system,  the fair market value of the Common Stock
            shall be deemed to be the  average of the  closing bid prices of the
            Common  Stock over the five trading  days  immediately  prior to the
            Determination Date; and

                        (C) If there is no public  market for the Common  Stock,
            then fair market value shall be  determined  by mutual  agreement of
            the holder of this Warrant and the Company.

                                      -8-

<PAGE>

If closing  prices or closing bid prices are no longer  reported by a securities
exchange or other trading  system,  the closing price or closing bid price shall
be that which is reported by such securities exchange or other trading system at
4:00 p.m. New York City time on the applicable trading day.

         10.3 Exercise  Prior to  Expiration.  To the extent this Warrant is not
previously  exercised as to all of the Shares  subject  hereto,  and if the fair
market value of one share of the Common Stock is greater than the Warrant  Price
then in effect, this Warrant shall be deemed automatically exercised pursuant to
Section 10.2 above (even if not surrendered)  immediately before its expiration.
For purposes of such automatic  exercise,  the fair market value of one share of
the Common Stock upon such  expiration  shall be determined  pursuant to Section
10.2(c).   To  the  extent  this  Warrant  or  any  portion  thereof  is  deemed
automatically  exercised  pursuant to this Section 10.3,  the Company  agrees to
promptly  notify the holder  hereof of the number of Shares,  if any, the holder
hereof is to receive by reason of such automatic exercise.

         11. Representations and Warranties. The Company represents and warrants
to the holder of this Warrant as follows:

             (a) This  Warrant  has been duly  authorized  and  executed  by the
Company and is a valid and binding  obligation  of the  Company  enforceable  in
accordance with its terms,  subject to laws of general  application  relating to
bankruptcy,  insolvency  and the  relief  of  debtors  and the  rules  of law or
principles at equity governing specific performance, injunctive relief and other
equitable remedies;

             (b) The Shares have been duly  authorized and reserved for issuance
by the Company  and,  when issued in  accordance  with the terms  hereof will be
validly issued, fully paid and non-assessable;

             (c) The  execution  and  delivery of this  Warrant are not, and the
issuance of the Shares  upon  exercise of this  Warrant in  accordance  with the
terms hereof will not be, inconsistent with the Company's Charter or by-laws, do
not and will not contravene any law,  governmental rule or regulation,  judgment
or order  applicable  to the Company,  and do not and will not conflict  with or
contravene  any  provision  of, or constitute a default  under,  any  indenture,
mortgage,  contract  or other  instrument  of which the Company is a party or by
which it is bound or require the  consent or  approval  of, the giving of notice
to, the registration or filing with or the taking of any action in respect of or
by, any Federal,  state or local government authority or agency or other person,
except for the filing of notices  pursuant to federal and state securities laws,
which filings will be effected by the time required thereby; and

             (d)  There  are  no  actions,  suits,  audits,   investigations  or
proceedings pending or, to the knowledge of the Company,  threatened against the
Company in any court or before any governmental  commission,  board or authority
which,  if  adversely  determined,  will have a material  adverse  effect on the
ability of the Company to perform its obligations under this Warrant.

                                      -9-

<PAGE>

         12.  Modification and Waiver. This Warrant and any provision hereof may
be changed,  waived,  discharged or terminated  only by an instrument in writing
signed by the party against which enforcement of the same is sought.

         13.  Notices.  Any notice,  request,  communication  or other  document
required  or  permitted  to be given or  delivered  to the holder  hereof or the
Company  shall be delivered,  or shall be sent by certified or registered  mail,
postage prepaid, to each such holder at its address as shown on the books of the
Company or to the Company at the  address  indicated  therefor on the  signature
page of this Warrant.

         14. Binding  Effect on  Successors.  This Warrant shall be binding upon
any corporation  succeeding the Company by merger,  consolidation or acquisition
of all or substantially all of the Company's assets,  and all of the obligations
of the Company  relating to the Shares  issuable upon the exercise or conversion
of this Warrant shall survive the exercise,  conversion and  termination of this
Warrant and all of the  covenants  and  agreements of the Company shall inure to
the benefit of the successors and assigns of the holder hereof.

         15. Lost Warrants or Stock  Certificates.  The Company covenants to the
holder  hereof that,  upon receipt of evidence  reasonably  satisfactory  to the
Company of the loss,  theft,  destruction  or  mutilation of this Warrant or any
stock certificate and, in the case of any such loss, theft or destruction,  upon
receipt of an indemnity  reasonably  satisfactory to the Company, or in the case
of any such mutilation upon surrender and  cancellation of such Warrant or stock
certificate,  the  Company  will  make  and  deliver  a  new  Warrant  or  stock
certificate,  of like tenor, in lieu of the lost, stolen, destroyed or mutilated
Warrant or stock certificate.

         16.  Descriptive  Headings.  The  descriptive  headings  of the several
paragraphs  of  this  Warrant  are  inserted  for  convenience  only  and do not
constitute  a part of this  Warrant.  The  language  in this  Warrant  shall  be
construed  as to its fair  meaning  without  regard to which party  drafted this
Warrant.

         17.  Governing  Law.  This Warrant  shall be construed  and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of California.

         18.  Survival  of  Representations,   Warranties  and  Agreements.  All
representations  and  warranties of the Company and the holder hereof  contained
herein  shall  survive the Date of Grant,  the  exercise or  conversion  of this
Warrant  (or any  part  hereof)  or the  termination  or  expiration  of  rights
hereunder.  All agreements of the Company and the holder hereof contained herein
shall survive  indefinitely until, by their respective terms, they are no longer
operative.

         19.  Remedies.  In case any one or more of the covenants and agreements
contained in this Warrant shall have been  breached,  the holders hereof (in the
case of a breach by the  Company),  or the Company (in the case of a breach by a
holder),  may proceed to protect and enforce  their or its rights either by suit
in equity and/or by action at law, including,  but not limited to, an action for
damages as a result of any such breach and/or an action for specific performance
of any such covenant or agreement contained in this Warrant.

                                      -10-

<PAGE>

         20. No Impairment of Rights.  The Company will not, by amendment of its
Charter or through any other  means,  avoid or seek to avoid the  observance  or
performance  of any of the terms of this Warrant,  but will at all times in good
faith assist in the carrying out of all such terms and in the taking of all such
action as may be necessary or  appropriate in order to protect the rights of the
holder of this Warrant against impairment.

         21.  Severability.  The invalidity or unenforceability of any provision
of  this  Warrant  in  any  jurisdiction   shall  not  affect  the  validity  or
enforceability of such provision in any other jurisdiction,  or affect any other
provision of this Warrant, which shall remain in full force and effect.

         22.  Recovery  of  Litigation  Costs.  If any  legal  action  or  other
proceeding  is brought for the  enforcement  of this  Warrant,  or because of an
alleged dispute, breach, default, or misrepresentation in connection with any of
the provisions of this Warrant,  the  successful or prevailing  party or parties
shall be entitled to recover reasonable attorneys' fees and other costs incurred
in that action or  proceeding,  in  addition to any other  relief to which it or
they may be entitled.

         23. Entire Agreement; Modification. This Warrant constitutes the entire
agreement  between the parties  pertaining to the subject matter contained in it
and supersedes all prior and contemporaneous  agreements,  representations,  and
undertakings  of the  parties,  whether  oral or written,  with  respect to such
subject matter.

                  [Remainder of page intentionally left blank]

                                      -11-

<PAGE>

                                      INFOCAST CORPORATION

                                      By: /s/ James Leech
                                          -------------------------------------
                                      Title:    President

                                      Address:  1 Richmond St. W.
                                                Toronto, Ontario

                           [Signature page to Warrant]

<PAGE>

                                   EXHIBIT A-1

                               NOTICE OF EXERCISE

To:  INFOCAST CORPORATION (the "Company")

       1.    The undersigned hereby:

             |_|   elects to purchase __ shares of Common  Stock of the  Company
                   pursuant to the terms of the  attached  Warrant,  and tenders
                   herewith  payment  of the  purchase  price of such  shares in
                   full, or

             |_|   elects  to  exercise  its net  issuance  rights  pursuant  to
                   Section  10.2 of the  attached  Warrant  with  respect to ___
                   shares of Common Stock.

       2. Please issue a certificate or certificates representing said shares in
the name of the  undersigned  or in such  other  name or names as are  specified
below:

                         ______________________________
                                     (Name)

                         ______________________________

                         ______________________________
                                    (Address)

            3. The undersigned  represents  that the aforesaid  shares are being
acquired for the account of the  undersigned  for investment and not with a view
to, or for resale in  connection  with,  the  distribution  thereof and that the
undersigned  has no present  intention of distributing or reselling such shares,
all except as in compliance with applicable securities laws.

                             SUN MICROSYSTEMS, INC.

                         ______________________________
                                   (Signature)

___________________________
(Date)

<PAGE>

                                   EXHIBIT A-2

                               NOTICE OF EXERCISE

To:  INFOCAST CORPORATION (the "Company")

            1.  Contingent upon and effective  immediately  prior to the closing
(the  "Closing")  of  the  Company's   public   offering   contemplated  by  the
Registration Statement on Form S-1, filed ________, 2000 the undersigned hereby:

                |_|    elects to  purchase  ____  shares of Common  Stock of the
                       Company (or such  lesser  number of shares as may be sold
                       on behalf of the undersigned at the Closing)  pursuant to
                       the terms of the attached Warrant, or

                |_|    elects to exercise  its net issuance  rights  pursuant to
                       Section 10.2 of the attached  Warrant with respect to ___
                       Shares of Common Stock.

            2. Please  deliver to the custodian for the selling  shareholders  a
stock certificate representing such _______ shares.

            3. The  undersigned  has  instructed  the  custodian for the selling
shareholders  to deliver to the Company  $________ or, if less, the net proceeds
due the undersigned from the sale of shares in the aforesaid public offering. If
such net  proceeds  are less  than  the  purchase  price  for such  shares,  the
undersigned  agrees  to  deliver  the  difference  to the  Company  prior to the
Closing.

                             SUN MICROSYSTEMS, INC.

                          ____________________________
                                     (Name)

                          ____________________________

                          ____________________________
                                    (Address)

________________________
(Date)

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