Document:

<PAGE>   1
                                                                    Exhibit 10.5

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT
AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR ANY STATE
SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE
OF SUCH REGISTRATION OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE
COMPANY THAT THERE IS AN EXEMPTION FROM SAID ACT AND ANY APPLICABLE STATE
SECURITIES LAWS.

                                                               WARRANT NO.  C-1

                                                          ISSUED AUGUST 10, 2000
--------------------------------------------------------------------------------

                               WARRANT TO PURCHASE
                      SHARES OF SERIES C PREFERRED STOCK OF
                   INTEROSA, INC. (VOID AFTER AUGUST 10, 2003)

         This certifies that Zero.net, Inc., (the "Holder"), or its assigns or
designees, for value received, is entitled to purchase from Interosa, Inc., a
Delaware corporation (the "Company"), a total of 183,381 fully paid and
nonassessable shares of the Company's Series C Preferred Stock (the "Series C
Stock") for cash at a price of $0.01 per share (the "Stock Purchase Price") at
any time or from time to time up to and including the earlier of (the
"Expiration Date"):

                  (a) 5:00 p.m. (Mountain Time) on August 10, 2003; or

                  (b) the closing of an initial offering for the Company's first
firm commitment underwritten public offering of its Common Stock under the
Securities Act of 1933, as amended;

upon surrender to the Company at its principal office (or at such other location
as the Company may advise the Holder in writing) of this Warrant properly
endorsed with the Subscription Form attached hereto as EXHIBIT A duly filled in
and signed and, if applicable, upon payment in cash or by check of the aggregate
Stock Purchase Price for the number of shares for which this Warrant is being
exercised determined in accordance with the provisions hereof. The Stock
Purchase Price and the number of shares purchasable hereunder are subject to
adjustment as provided in Section 3 of this Warrant. The Company shall provide
at least fifteen days advance notice of the closing date of the Initial Offering
or any Liquidation Event (as defined in the Restated Certificate of
Incorporation of the Company effective as of the date of issuance of this
Warrant). The exercise of this Warrant with respect to such events shall be
governed by the additional terms and conditions set forth in the Subscription
Form.

1. EXERCISE; ISSUANCE OF CERTIFICATES; PAYMENT FOR SHARES.

         1.1. GENERAL. This Warrant is exercisable at the option of the holder
of record hereof, at any time or from time to time up to the Expiration Date for
all or any part of the shares of Series C Stock (but not for a fraction of a
share) which may be purchased hereunder.

         1.2. ISSUANCE OF CERTIFICATES. The Company agrees that the shares of
Series C Stock purchased under this Warrant shall be and are deemed to be issued
to the Holder hereof as the

                                       1
<PAGE>   2

record owner of such shares as of the close of business on the date on which
this Warrant shall have been surrendered, properly endorsed, the completed,
executed Subscription Form (a copy of which is attached hereto as EXHIBIT A)
delivered and payment made for such shares. Certificates for the shares of
Series C Stock so purchased, together with any other securities or property to
which the Holder hereof is entitled upon such exercise, shall be delivered to
the Holder hereof by the Company at the Company's expense within a reasonable
time (not to exceed ten (10) business days) after the rights represented by this
Warrant have been so exercised. Each stock certificate so delivered shall be in
such denominations of Series C Stock as may be requested by the Holder hereof
and shall be registered in the name of such Holder or, subject to the provisions
of Section 7, such Holder's designee. In case of a purchase of less than all the
shares which may be purchased under this Warrant, the Company shall cancel this
Warrant and execute and deliver a new Warrant or Warrants of like tenor for the
balance of the shares purchasable under the Warrant surrendered upon such
purchase to the Holder hereof within a reasonable time.

2. SHARES TO BE FULLY PAID; RESERVATION OF SHARES. The Company covenants and
agrees that all shares of Series C Stock that may be issued upon the exercise of
the rights represented by this Warrant will, upon issuance, be duly authorized,
validly issued, fully paid and nonassessable and free from all preemptive rights
of any stockholder and free of all taxes, liens and charges with respect to the
issue thereof. The Company further covenants and agrees that, during the period
within which the rights represented by this Warrant may be exercised, the
Company will at all times have authorized and reserved or, shall upon request of
the Holder authorize and reserve, for the purpose of issue or transfer upon
exercise of the subscription rights evidenced by this Warrant, a sufficient
number of shares of authorized but unissued Series C Stock, or other securities
and property, when and as required to provide for the exercise of the rights
represented by this Warrant. The Company will take all such action as may be
necessary to assure that such shares of Series C Stock may be issued as provided
herein without violation of any applicable law or regulation, or of any
requirements of any domestic securities exchange upon which the Series C Stock
may be listed; provided, however, that the Company shall not be required to
effect a registration under Federal or State securities laws with respect to
such exercise. The Company will not take any action which would result in any
adjustment of the Stock Purchase Price (as set forth in Section 3 hereof) (i) if
the total number of shares of Series C Stock issuable after such action upon
exercise of all outstanding warrants and options, together with all shares of
Series C Stock then outstanding, would exceed the total number of shares of
Series C Stock then authorized by the Company's Articles of Incorporation.

3. ADJUSTMENT OF STOCK PURCHASE PRICE AND NUMBER OF SHARES. The Stock Purchase
Price and the number of shares purchasable upon the exercise of this Warrant
shall be subject to adjustment from time to time upon the occurrence of certain
events described in this Section 3. Upon each adjustment of the Stock Purchase
Price, the Holder of this Warrant shall thereafter be entitled to purchase, at
the Stock Purchase Price resulting from such adjustment, the number of shares
obtained by multiplying the Stock Purchase Price in effect immediately prior to
such adjustment by the number of shares purchasable pursuant hereto immediately
prior to such adjustment, and dividing the product thereof by the Stock Purchase
Price resulting from such adjustment.

                                       2
<PAGE>   3

         3.1. SUBDIVISION OR COMBINATION OF STOCK. In case the Company shall at
any time subdivide its outstanding shares of Series C Stock into a greater
number of shares, the Stock Purchase Price in effect immediately prior to such
subdivision shall be proportionately reduced, and conversely, in case the
outstanding shares of Series C Stock of the Company shall be combined into a
smaller number of shares, the Stock Purchase Price in effect immediately prior
to such combination shall be proportionately increased.

         3.2. DIVIDENDS IN SERIES C STOCK, OTHER STOCK, PROPERTY,
RECLASSIFICATION. If at any time or from time to time the Holders of Series C
Stock (or any shares of stock or other securities at the time receivable upon
the exercise of this Warrant) shall have received or become entitled to receive,
without payment therefor,

                  3.2.1. Series C Stock or any shares of stock or other
securities which are at any time directly or indirectly convertible into or
exchangeable for Series C Stock, or any rights or options to subscribe for,
purchase or otherwise acquire any of the foregoing by way of dividend or other
distribution;

                  3.2.2. Any cash paid or payable otherwise than as a cash
dividend out of current earnings; or

                  3.2.3. Series C Stock or additional stock or other securities
or property (including cash) by way of spin-off, split-up, reclassification,
combination of shares or similar corporate rearrangement (other than (i) shares
of Series C Stock issued as a stock split, adjustments in respect of which shall
be covered by the terms of Section 3.1 above or (ii) an event for which
adjustment is otherwise made pursuant to Section 3.3 below);

then and in each such case, the Holder hereof shall, upon the exercise of this
Warrant, be entitled to receive, in addition to the number of shares of Series C
Stock receivable thereupon, and without payment of any additional consideration
therefor, the amount of stock and other securities and property (including cash
in the cases referred to in clauses 3.2.2 and 3.2.3 above) which such Holder
would hold on the date of such exercise had he been the holder of record of such
Series C Stock as of the date on which holders of Series C Stock received or
became entitled to receive such shares or all other additional stock and other
securities and property.

         3.3. REORGANIZATION, RECLASSIFICATION OR RECAPITALIZATION. If any
recapitalization, reclassification or capital reorganization of the capital
stock of the Company shall be effected in such a way that holders of Series C
Stock shall be entitled to receive stock, securities, or other assets or
property (a "Restructuring"), then, as a condition of such Restructuring, lawful
and adequate provisions shall be made whereby the Holder hereof shall thereafter
have the right to purchase and receive (in lieu of or in addition to the shares
of the Series C Stock of the Company immediately theretofore purchasable and
receivable upon the exercise of the rights represented hereby) such shares of
stock, securities or other assets or property as may be issued or payable with
respect to or in exchange for a number of outstanding shares of such Series C
Stock equal to the number of shares of such stock immediately theretofore
purchasable and receivable upon the exercise of the rights represented hereby
and appropriate provision shall be made with respect to the rights and interests
of the Holder of this Warrant to the end that the provisions hereof

                                       3
<PAGE>   4

(including, without limitation, provisions for adjustments of the Stock Purchase
Price and of the number of shares purchasable and receivable upon the exercise
of this Warrant) shall thereafter be applicable, as nearly as may be, in
relation to any shares of stock, securities or assets thereafter deliverable
upon the exercise hereof.

         3.4. NOTICE OF ADJUSTMENT. Upon any adjustment of the Stock Purchase
Price, any increase or decrease in the number of shares purchasable upon the
exercise of this Warrant or any change in the securities or other property
deliverable upon exercise of this Warrant, the Company shall give written notice
thereof within 30 days, by first class mail, postage prepaid, addressed to the
registered Holder of this Warrant at the address of such Holder as shown on the
books of the Company. Notice may also be given by e-mail or facsimile, provided
that a confirmation copy is sent by first class mail as set forth above. The
notice shall be signed by the Company's President and shall state the Stock
Purchase Price resulting from such adjustment, the increase or decrease, if any,
in the number of shares purchasable at such price upon the exercise of this
Warrant or the amount of securities or other property deliverable upon such
exercise, setting forth in reasonable detail the method of calculation and the
facts upon which such calculation is based.

         3.5. OTHER NOTICES. If at any time:

                  3.5.1. the Company shall declare any cash dividend upon its
Series C Stock;

                  3.5.2. the Company shall declare any dividend upon its Series
C Stock payable in stock or make any special dividend or other distribution to
the holders of its Series C Stock;

                  3.5.3. there shall be any Restructuring;

                  3.5.4. there shall be a voluntary or involuntary dissolution,
liquidation or winding-up of the Company; or

                  3.5.5. there shall be a filing with the Securities and
Exchange Commission of an initial public offering of Company securities;

then, in any one or more of said cases, the Company shall give, by overnight
courier, personal delivery or facsimile, addressed to the Holder of this Warrant
at the address of such Holder as shown on the books of the Company at least
three business days advance notice of the closing of such event.

4. CLOSING OF BOOKS. The Company will at no time close its transfer books
against the transfer of any warrant or of any shares of Series C Stock issued or
issuable upon the exercise of any warrant in any manner which interferes with
the timely exercise of this Warrant.

5. NO VOTING OR DIVIDEND RIGHTS; LIMITATION OF LIABILITY. Nothing contained in
this Warrant shall be construed as conferring upon the Holder hereof the right
to vote or to consent or to receive notice as a stockholder of the Company or
any other matters or any rights whatsoever as a stockholder of the Company. No
dividends or interest shall be payable or accrued in respect of this Warrant or
the interest represented hereby or the shares purchasable hereunder until, and
only to the extent that, this Warrant shall have been exercised. No provision
hereof in the

                                       4
<PAGE>   5

absence of affirmative action by the holder to purchase shares of Series C
Stock, and no mere enumeration herein of the rights or privileges of the Holder
hereof, shall give rise to any liability of such holder for the Stock Purchase
Price or as a stockholder of the Company, whether such liability is asserted by
the Company or by its creditors.

6. TRANSFER RESTRICTIONS. Subject to compliance with applicable federal and
state securities laws, this Warrant and all rights hereunder are transferable,
in whole or in part, without charge to the holder hereof (except for transfer
taxes), upon surrender of this Warrant properly endorsed and in compliance with
such provisions. The Company will maintain a register (the "Warrant Register")
containing the names and addresses of the Holder or Holders. Any Holder of this
Warrant or any portion thereof may change its address as shown on the Warrant
Register by written notice to the Company requesting such change. Any notice or
written communication required or permitted to be given to the Holder may be
delivered or given by mail to such Holder as shown on the Warrant Register and
at the address shown on the Warrant Register. Until this Warrant is transferred
on the Warrant Register of the Company, the Company may treat the Holder as
shown on the Warrant Register as the absolute owner of this Warrant for all
purposes, notwithstanding any notice to the contrary. This Warrant may not be
transferred or assigned without compliance with all applicable federal and state
securities laws by the transferor and the transferee. The Holder further agrees
not to make any disposition of all or any portion of this Warrant or any shares
of Series C Stock or any security into or for which such Series C Stock is
exchanged unless and until the transferee has agreed in writing for the benefit
of the Company to be bound by this Section to the extent such section is then
applicable, and:

                  There is then in effect a registration statement under the
1933 Act covering such proposed disposition and such disposition is made in
accordance with such registration statement; or

                  the Holder shall have notified the Company of the proposed
disposition and shall have furnished the Company with a detailed statement of
the circumstances surrounding the proposed disposition and if reasonably
requested by the Company, the Holder shall have furnished the Company with an
opinion of counsel, reasonably satisfactory to the Company, that such
disposition will not require registration of such securities under the 1933 Act.

7. RIGHTS AND OBLIGATIONS SURVIVE EXERCISE OF WARRANT. The rights and
obligations of the Company, of the holder of this Warrant and of the holder of
shares of Series C Stock issued upon exercise of this Warrant shall survive the
exercise of this Warrant.

8. MODIFICATION AND WAIVER. Any term of this Warrant may be amended and the
observance of any term of this Warrant may be waived (either generally or in a
particular instance and either retroactively or prospectively), with the written
consent of the Company and the holders of Warrants representing a majority of
the Series C Stock into which the Warrant may be converted. Any waiver or
amendment effected in accordance with this Section shall be binding upon the
holder of this Warrant and the holder of any securities into which this Warrant
may be converted, and upon the Company.

                                       5
<PAGE>   6

9. NOTICES. Any notice, request 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 first-class 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 in the first paragraph of this Warrant or such other address
as either may from time to time provide to the other.

10. 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. All of the obligations of the
Company relating to the Series C Stock issuable upon the exercise of this
Warrant shall survive the exercise and termination of this Warrant. All of the
covenants and agreements of the Company shall inure to the benefit of the
successors and assigns of the holders hereof.

11. DESCRIPTIVE HEADINGS AND GOVERNING LAW. The description headings of the
several sections and paragraphs of this Warrant are inserted for convenience
only and do not constitute a part of this Warrant. 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 Colorado.

12. LOST WARRANTS. The Company represents and warrants to the Holder hereof that
upon receipt of evidence reasonably satisfactory to the Company of the loss,
theft, destruction, or mutilation of this Warrant 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, the Company, at its expense, will make and deliver
a new Warrant, of like tenor, in lieu of the lost, stolen, destroyed or
mutilated Warrant.

13. FRACTIONAL SHARES. No fractional shares shall be issued upon exercise of
this Warrant. The Company shall, in lieu of issuing any fractional share, pay
the holder entitled to such fraction a sum in cash equal to such fraction
multiplied by the then effective fair market value of the Series C Stock.

THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK

                                       6
<PAGE>   7
         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed by its President, thereunto duly authorized this 10th day of August,
2000.

INTEROSA, INC.,                         ZERO.NET, INC.,
a Delaware corporation                  a Delaware corporation

By: /s/ Geoff Mulligan                  By:  /s/ Craig Sternberg
    ----------------------------------      ------------------------------------
    Title: Chief Executive Officer          Title:

                                       7<PAGE>   1
                                                                    Exhibit 10.6

                                 LOAN AGREEMENT
                             SECURED PROMISSORY NOTE

$540,000.00                                                    September 8, 2000

BORROWER:                  ENVISION DEVELOPMENT CORP.
                           100 Nickerson Road
                           Marlboro, MA 01752

LENDER:                    DOMINION INCOME MANAGEMENT CORP.
                           21520 30TH DRIVE S.E., STE. 105
                           BOTHELL, WA 98021

FOR VALUE RECEIVED, the undersigned Borrower, promises to pay UPON DEMAND, or if
no demand then on or before August 31, 2001, to Dominion Income Management
Corp., ("Lender"), or its assigns, in lawful money of the United States of
America, the principal sum of the Loan Amount, Five Hundred Forty Thousand and
no/100 Dollars ($540,000.00), together with interest from the date of this Note
on the unpaid principal balance at a rate of the Prime Rate of interest plus 2%
per annum as reported from time to time in the Wall Street Journal, computed on
the basis of the actual number of days elapsed and a year of 365 days. The
entire unpaid principal and accrued interest thereon, if any, shall become
immediately due and payable on demand by the holder hereof. Unless demand is
earlier made, the entire unpaid balance of the Note including interest shall be
due August 31, 2001.

CONSIDERATION; ADVANCES, REPAYMENT AND DUE DATE. The consideration for this Note
is the loan of money, including advances made or to be made hereunder by the
Lender to the Borrower for business purposes in the amount of $540,000.

PREPAYMENT. This Note may be prepaid in whole or in part at any time without
premium or penalty. All prepayments shall be applied first to interest, then to
principal payments in the order of their maturity.

DEFAULT. The occurrence of any of the following shall constitute an "Event of
Default" under this Note:

     (a)  Borrower shall fail to pay upon demand or when due any principal or
          interest hereunder; or

     (b)  Borrower shall (i) apply for or consent to the appointment of a
          receiver, trustee, liquidator or custodian of itself or of all or a
          substantial part of its property, (ii) be unable, or admit in writing
          its inability, to pay its debts generally as they mature, (iii) make a
          general assignment for the benefit of its or any of its creditors,
          (iv) be dissolved or liquidated, (v) become insolvent (as such term
          may be defined or interpreted under any applicable statute), (vi)
          commence a voluntary case or other proceeding seeking liquidation,
          reorganization or other relief with respect to itself or its debts
          under any bankruptcy, insolvency or other similar law now or hereafter
          in effect or consent to any such relief or to the appointment of or
          taking possession of its property by any official in an involuntary
          case or other proceeding commenced against it, or (vii) take any
          action for the purpose of effecting any of the foregoing; or

     (c)  Proceedings for the appointment of a receiver, trustee, liquidator or
          custodian of Borrower or of all or a substantial part of the property
          thereof, or an involuntary case or other proceedings seeking
          liquidation, reorganization or other relief with respect to or the
          debts thereof under any bankruptcy, insolvency or other similar law
          now or hereafter in effect shall be commenced and an order for relief
          entered or such proceeding shall not be dismissed or discharged within
          thirty (30) days of commencement.

PROMISSORY NOTE
Page 1 of 2

<PAGE>   2

     (d)  Borrower shall have a period of (30) thirty days from an "Event of
          Default", as defined herein, to repay the entire balance outstanding
          and remedy such default.

COLLECTION, DEFAULT INTEREST, ATTORNEYS' FEES AND COSTS. If this Note shall be
in default, the balance due shall be accelerated without further notice, and
interest shall accrue thereon at the rate of 18% per annum until paid in full,
at such rate as not to exceed the rate permitted by the laws of the State of
Massachusetts. If this Note is placed in the hands of an attorney for
collection, whether or not suit shall be brought to collect any of the
principal, interest or deficiency of this Note, the Borrower promises to pay
reasonable attorneys' fees and all costs of collection. Borrower hereby waives
notice of default, presentment of demand for payment, protest or notice of
nonpayment or dishonor and all other notices or demands relative to this
instrument. All payments shall be made at 21520 30th Drive S.E. Bothell, WA
98021 or at such other place as the holder hereof may from time to time
designate in writing.

SECURITY. This Note and all undertakings hereunder, shall be secured by a
security agreement of even date herewith.

APPLICABLE LAW; JURISDICTION AND VENUE. This Note and all actions arising out of
or in connection with this Note shall be governed by and construed in accordance
with the laws of the State of Massachusetts. Any action under this Note may, at
Lender's option be brought in a court of competent jurisdiction in the State of
Massachusetts.

REPRESENTATIONS AND NOTICE TO BORROWER. Except as expressly set forth herein in
writing, the Lender makes no representations, promises or commitments to lend
money, to otherwise extend credit, to recover with respect to the repayment of
any debt or the exercise of any remedy, to modify or amend the terms under which
the Lender has lent money or otherwise extended credit, to release any guarantor
or cosigner, or to make any other financial accommodation pertaining to the debt
or other extension of credit. Borrower acknowledges that neither the Lender, nor
its agents or attorneys have made any such or other representations; and that
they will not rely on any representations except those stated in writing. The
terms of this Note may not be modified except in writing executed by both the
Lender and the Borrower.

IN WITNESS WHEREOF, Borrower has caused this Note to be executed, issued and
delivered as of the date first written above.

BORROWER:

ENVISION DEVELOPMENT CORPORATION

/s/ Michael Amideo
---------------------------------------
Michael Amideo, Chief Executive Officer

PROMISSORY NOTE
Page 2 of 2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00015-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00015-of-00352.parquet"}]]