Document:

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                      ASSIGNMENT AND SUBSCRIPTION AGREEMENT

         Madison E, Priest, in consideration of the receipt of $400,000 and
other good and valuable consideration as set forth in paragraph 3, below, and
described elsewhere herein, hereby assigns, conveys, and transfers to Telecom
Wireless Corporation ("TWC") that portion of his interest in VisionTek, L.P.,
a dissolved Delaware limited partnership in liquidation ("VTLP"), equal to 2%
of 100% of the liquidating distribution of VTLP.

         Mr. Priest and TWC both understand that VTLP is in liquidation, that
Linda W. Priest (Mr. Priest's wife) is the liquidator of VTLP, and that VTLP
will be assigning its intellectual property, personal property, and other
assets, subject to its liabilities (including litigation pending in various
courts with Level One Corporation and Zekko Corporation), to HLN Network
Corporation, a Delaware corporation ("HLN") in consideration of 2,500 shares
of Series B Common Stock of HLN. It is also the understanding of Mr. Priest
and TWC that HLN will distribute the Series B Common Stock to the partners of
VTLP in accordance with their interests in liquidating distributions.

         1. To induce TWC to enter into this assignment and subscription
agreement, Mr. Priest represents and warrants to TWC as follows:

                  a.       Mr. Priest owns the interest in VTLP being assigned
                           to TWC free and clear of all encumbrances, liens, and
                           other liabilities.

                  b.       Mr. Priest has the legal capacity to assign his
                           interest in VTLP and his future interest in HLN,
                           subject only to the approval of the liquidator of
                           VTLP and the Board of Directors of HLN.

                  c.       Mr. Priest did not encounter TWC through any form of
                           public advertising or general solicitation.

                  d.       The interest in VTLP being assigned hereby will
                           entitle TWC to a distribution of 50 shares of Series
                           B Common Stock of HLN when such shares are
                           distributed to the partners of VTLP by the
                           liquidator. To the extent this interest results in
                           fewer than 50 shares, Mr. Priest will assign
                           additional shares to TWC; to the extent this interest
                           results in greater than 50 shares, Mr. Priest retains
                           such shares.

         2. To induce Mr. Priest to enter into this assignment and
subscription agreement, TWC represents and warrants to Mr. Priest as follows,
with TWC's understanding and agreement that VTLP and HLN will each rely on
these representations and warranties as though the representations and
warranties were made directly to HLN and VTLP:

                  a.       TWC understands that an investment in VTLP and
                           (following the liquidating distribution) HLN is one
                           of high risk, and a significant possibility exists
                           that TWC

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 2

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                           may lose his entire investment. Without limiting the
                           generality of the foregoing, TWC specifically
                           understands that:

                                    The proceeds to be received from TWC will
                           not be sufficient for HLN to accomplish its corporate
                           objectives as outlined in the due diligence
                           information received by TWC.

                                    The ownership of the intellectual property
                           that forms the basis for the Technology owned by VTLP
                           (which will be assigned to HLN) is primarily with
                           VTLP, but also is possibly with certain individuals
                           including, without limitation, Mr. Priest, Mrs.
                           Priest, and J. Mark Strong. TWC understands that,
                           although these persons have agreed to assign their
                           interests in the intellectual property, the
                           Technology, and the other assets of VTLP, they have
                           not yet done so.

                                    HLN has entered or will shortly enter into
                           an agreement by which an unaffiliated entity by which
                           that entity will have an option to acquire 817 shares
                           of Series A Preferred Stock to be issued by HLN for a
                           total investment of $8,170,000, a portion of which
                           investment will include the reimbursement of expenses
                           previously incurred by such entity. That entity will
                           also obtain an option to enter into an exclusive
                           manufacturing agreement for the broadband
                           communications units, as well as obtaining certain
                           marketing rights. The Series A Preferred Stock will
                           be created with voting rights, liquidation and
                           dividend rights, and other rights and preferences
                           which will be senior to the Series B Common Stock.

                                    HLN can offer no assurance that its
                           technology will ever result in a broadband
                           communications unit of the type witnessed by
                           representatives of TWC becoming available
                           commercially or, if it becomes commercially
                           available, that it will become a commercial success.

                                    The Series B Common Stock has been
                           authorized pursuant to a certificate of designation
                           filed with the Delaware Secretary of State and which
                           TWC has reviewed to the extent it has determined such
                           review to be necessary or appropriate.

                                    The interest in VTLP is subject to the
                           provisions and restrictions contained in the limited
                           partnership agreement for VTLP, which TWC has
                           reviewed to the extent it has determined such review
                           to be necessary or appropriate.

                                    HLN is in the process of negotiating certain
                           compensation arrangements with four persons
                           (including Mr. Priest) who are, and who will continue
                           to be, key employees of HLN. TWC will not be required
                           to approve such compensation arrangements.

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 3

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                                    As you have been previously advised, VTLP is
                           involved in certain litigation involving its
                           intellectual property which is in the preliminary
                           stages and, although VTLP and HLN believe they have
                           good claims and meritorious defenses, there can be no
                           assurance with regard to the possible outcome of the
                           litigation.

                                    TWC has received a significant amount of
                           information, and has the right to continue to ask for
                           and obtain further information regarding the
                           foregoing or any other information about VTLP and HLN
                           which TWC deems to be relevant to its decision to
                           subscribe to purchase the interests being offered
                           hereby.

                  b.       The interest in VTLP, and the shares of Series B
                           Common Stock of HLN to be distributed upon the
                           liquidation of VTLP are being and will be acquired by
                           TWC for his own account and not on behalf of any
                           other person or entity. The Securities are being
                           acquired for investment purposes and not for resale
                           or distribution.

CAVEAT: CERTAIN STATEMENTS CONTAINED HEREIN AND WHICH HAVE BEEN GIVEN TO TWC IN
OTHER DOCUMENTS USING THE TERMS "MAY", "EXPECTS TO", AND OTHER TERMS DENOTING
FUTURE POSSIBILITIES, ARE FORWARD-LOOKING STATEMENTS. THE ACCURACY OF THESE
STATEMENTS CANNOT BE GUARANTEED AS THEY ARE SUBJECT TO A VARIETY OF RISKS WHICH
ARE BEYOND VTLP'S OR HLN'S ABILITY TO PREDICT OR CONTROL. THESE RISKS MAY CAUSE
ACTUAL RESULTS TO DIFFER MATERIALLY FROM THE PROJECTIONS OR ESTIMATES CONTAINED
IN THIS REPORT. THESE RISKS INCLUDE, BUT ARE NOT LIMITED TO, THE POSSIBILITY
THAT THE DESCRIBED OPERATIONS OR OTHER ACTIVITIES WILL NOT BE COMPLETED ON
ECONOMIC TERMS, IF AT ALL. THE OPERATIONS CONTEMPLATED BY HLN FOLLOWING THE
LIQUIDATION OF VTLP ARE ATTENDANT WITH HIGH RISK. THERE CAN BE NO ASSURANCE THAT
HLN WILL SUCCEED IN OPERATING THE CONTEMPLATED BUSINESS, AND IT IS IMPORTANT
THAT EACH PERSON CONSIDERING AND INVESTMENT PURSUANT TO THIS SUBSCRIPTION
AGREEMENT UNDERSTANDS THE SIGNIFICANT RISKS WHICH ACCOMPANY THE PROPOSED CONDUCT
OF HLN'S FUTURE OPERATIONS.

                  c.       Neither Mr. Priest nor TWC is aware of the payment of
                           any commission or other remuneration to any person in
                           connection with the execution of this assignment to
                           acquire interests of VTLP from T,&. Priest, or the
                           purchase of the Series B Common Stock.

                  d.       TWC acknowledges receipt of documents defining the
                           Series B Common Stock and such additional information
                           disclosing the business, financial condition, and
                           management of VTLP and HLN, as it has deemed
                           necessary or appropriate for the purposes of
                           considering this investment.

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 4

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                  e.       HLN and the liquidator for VTLP have each given TWC
                           the opportunity to ask questions of and to receive
                           answers from persons acting on their behalf
                           concerning the terms and conditions of this
                           transaction and the opportunity to obtain any
                           additional information regarding VTLP, HLN, its
                           respective business and financial condition which HLN
                           or VTLP possesses or can acquire without unreasonable
                           effort or expense including (without limitation) all
                           minutes of meetings of the Board of Directors of HLN
                           or committees thereof, and other relevant documents
                           requested by TWC. In addition, TWC has made such
                           other financial or other inquiry as TWC deems
                           necessary or appropriate in the conduct of TWC'S due
                           diligence investigation and has not relied on due
                           diligence of any other party in connection herewith.

                  f.       TWC acknowledges and understands, however, that
                           neither VTLP nor its liquidator, nor HLN has
                           authorized any person to make any statements on its
                           behalf which would in any way contradict any of the
                           information which VTLP or HLN has provided to TWC in
                           writing, including the information set forth in this
                           Subscription Agreement, and TWC further represents to
                           Mr. Priest, HLN and VTLP that TWC has not relied upon
                           any such representations regarding HLN, VTLP, its
                           respective business or financial condition, or this
                           transaction in making any decision to acquire
                           interests in VTLP and, upon distribution, the Series
                           B Common Stock. If TWC becomes aware of conflicting
                           information, TWC will discuss this with management of
                           HLN and the liquidator of VTLP.

                  g.       TWC'S present financial condition is such that it is
                           unlikely that it would be necessary for TWC to
                           dispose of or leverage either his interest in VTLP or
                           the Series B Common Stock when received upon
                           distribution from VTLP, in the foreseeable future.

                  h.       TWC acknowledges and understands that there is no
                           market for the interests in VTLP or for any class of
                           HLN's capital stock and there can be no assurance
                           that any such market will ever develop.

                  i.       TWC understands that the interests in VTLP being
                           acquired hereby are, and the shares of Series B
                           Common Stock will be and will continue to be
                           restricted securities within the meaning of Rule 144
                           of the General Rules and Regulations promulgated
                           under the Securities Act of 1933, as amended (the
                           "Act"), and applicable state statutes, and consents
                           to the placement of an appropriate restrictive legend
                           or legends on any certificates evidencing the
                           Securities and any certificates issued in replacement
                           or exchange therefor and acknowledges that VTLP and
                           HLN, as appropriate, will cause its stock transfer
                           records to note such restrictions.

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 5

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                  j.       TWC understands that the Series B Common Stock which
                           will be acquired on receipt of a liquidating
                           distribution from HLN will be subject to the
                           following co- sale rights and rights of first
                           refusal:

                           Each holder of outstanding equity securities of HLN
                           has (and by executing this Subscription Agreement TWC
                           specifically grants) a right of first refusal with
                           respect to any transfer by it of any shares of any
                           class or series of equity securities of HLN. In
                           addition, any person seeking to purchase shares of
                           any class or series of equity security from TWC must
                           offer and be prepared to purchase all shares held by
                           all other holders of equity securities on the same
                           price and terms. The foregoing rights will expire
                           upon the completion of an initial public offering by
                           HLN. The following transactions are specifically
                           excepted from the foregoing provision:

                           (i)      Transfers of shares for estate planning
                                    purposes; and

                           (ii)     Transfers of common stock by a shareholder
                                    which aggregate less than 1% of the total
                                    number of shares of common stock outstanding
                                    during any twelve month period unless
                                    transfer of a larger amount has been
                                    approved by the Board of Directors of HLN.

                  k.       TWC agrees to disclose to any proposed buyer or
                           transferee of the Series B Common Stock the
                           restrictions relating to the sale or transfer of the
                           Securities being purchased hereby.

                  l.       By TWC's execution below, it is acknowledged and
                           understood that VTLP and HLN, and each of them and
                           their respective officers, directors, and liquidator,
                           is and are relying upon the accuracy and completeness
                           hereof in complying with certain obligations under
                           applicable securities laws.

                  m.       TWC has reviewed the terms of this Subscription
                           Agreement and all of the documents attached hereto,
                           delivered in connection herewith or otherwise
                           referenced herein with its legal, investment, tax,
                           and financial advisors to the extent TWC deems such
                           consultation appropriate, and TWC has also consulted
                           with such advisors with regard to the advisability of
                           this investment to the extent TWC deems such
                           consultation to be appropriate. TWC acknowledges that
                           VTLP and HLN has each advised TWC that it recommends
                           that TWC obtain such advice and consultation. TWC
                           further acknowledges that it has neither sought nor
                           received any advice from HLN or VTLP, or any of their
                           respective agents or affiliates with respect to any
                           aspect of this Assignment and Subscription Agreement
                           or the Investment under this Assignment and
                           Subscription Agreement.

                  n.       TWC acknowledges that an investment in VTLP and in
                           the Series B Common Stock of HLN is a suitable
                           investment for it, taking into consideration the
                           significant risks

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 6

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                           associated with their business, the restrictions on
                           transferability and the other considerations
                           affecting VTLP and the Series B Common Stock and HLN
                           as described herein and in the documents referenced
                           herein, and in the investigation that TWC has made.

         3.       This Agreement may be amended or modified only in writing
                  signed by the parties hereto. No evidence shall be admissible
                  in any court concerning any alleged oral amendment hereof This
                  Agreement fully integrates all prior agreements and
                  understandings between the parties concerning its subject
                  matter.

         4.       This Agreement binds and inures to the benefit of the
                  representatives, successors and permitted assigns of the
                  respective parties hereto.

         5.       Each party hereto agrees for itself, its successors and its
                  permitted assigns to execute any and all instruments necessary
                  for the fulfillment of the terms of this Agreement.

         6.       This Agreement is made under, shall be construed in accordance
                  with and shall be governed by the laws of the State of
                  Delaware.

         IN WITNESS WHEREOF, subject to acceptance by the liquidator for VTLP
and HLN, the undersigned has completed this Assignment and Subscription
Agreement and tendered payment as set forth above to evidence the undersigned's
commitment to purchase the Securities as set forth above.

                          TELECOM WIRELESS CORPORATION

Date:     9/13      , 1999
     ---------------

SSN:                                   By:    /s/ James C. Roberts
   -------------------------------        -------------------------------------
                                              James C. Roberts, Ph.D., President
                                              5299 DTC Boulevard, Suite 1200
                                              Englewood, CO 80111

SUBSCRIPTION ACCEPTED SUBJECT TO THE TERMS HEREOF.

                         HYPERLIGHT NETWORK CORPORATION

    9/13         , 1999                By   /s/ J. Mark Strong
-----------------                         --------------------------------------
                                       J. Mark Strong, President

                                       VISION TEK, L.P.

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 7

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                                       By:
                                          -------------------------------------
                                          Linda B. Priest, Liquidator

PRIEST-TELECOM WIRELESS CORPORATION ASSIGNMENT AND SUBSCRIPTION AGREEMENT PAGE 8<PAGE>

                         HYPERLIGHT NETWORK CORPORATION
                            INTERIM FUNDING AGREEMENT

         This INTERIM FUNDING AGREEMENT is made as of this 13th day of
September, 1999 between Hyperlight Network Corporation, a Delaware
corporation ("HLN"), and Telecom Wireless Corporation ("TWC").

         In consideration of HLN's agreement to assist TWC in making
arrangements by which TWC may acquire equity in Vision Tek, L.P. from certain
limited partners of Vision Tek, L.P., and for other good and valuable
consideration (the sufficiency of which both TWC and HLN acknowledge), TWC
agrees to pay to HLN of the amount of $1,200,000 (which payment will be made
in accordance with the schedule set forth in paragraph 1, below.

         1. PAYMENT SCHEDULE. This rights granted in this Agreement will
expire immediately if TWC fails to make any of the following payments to HLN,
and any equity purchased or otherwise acquired by TWC in Vision Tek, L.P. or
HLN will be deemed to have waived any economic rights or voting rights until
payment has been made in full, plus interest thereon at 1.5% per month from
the date the payment was originally due and which will be in default unless
paid within fifteen days of the date due:

         (a)      $300,000 on or before September 10, 1999 (for the period
                  September 1, 1999 through December 1, 1999;
         (b)      $300,000 on or before December 1, 1999;
         (c)      $300,000 on or before March 1, 2000; and
         (d)      $300,000 on or before June 1, 2000.

Such payments will be due whether or not TWC has acquired any equity in
Vision Tek, L.P. or HLN. If TWC does not acquire any interest in Vision Tek,
L.P. or HLN, all payments HLN received as a result of this Interim Funding
Agreement will be converted to debt on HLN's books. Such debt will bear
interest at 8% per annum, and repayment of such debt will be made in level
payments over a 24 month period commencing on the first day of the month
after HLN has recognized six months of positive cash flow. These payments
will be in default unless paid within thirty days of the date due, and the
obligation to make payment will be represented by a promissory note in
standard commercial form. If HLN has not received positive cash flow during
the 24 months following the termination of this agreement, TWC will be
granted a preferential liquidation right in a form to be negotiated, in
addition to the requirement that the amount be repaid after sufficient
positive cash flow has been received. For the purposes of this paragraph, the
term "positive cash flow", means earnings before income taxes, depreciation,
and amortization determined in accordance with generally accepted accounting
principles, consistently applied, and after subtracting the principal portion
of any debt service obligation.

2. NONTRANSFERABILITY OF RIGHTS. The rights granted herein may not be
assigned, transferred or otherwise disposed of, or pledged or hypothecated in
any way (whether by operation of law or otherwise) except with the written
consent of the other party, which consent may not be

HYPERLIGHT NETWORK CORPORATION INTERIM FUNDING AGREEMENT                  PAGE 1

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unreasonably withheld. HLN acknowledges that TWC is engaged in certain
negotiations for a business combination with FlashNet. HLN hereby accepts an
assignment of this agreement to FlashNet in conjunction with a completion of
such business combination. HLN agrees to keep all material non-public
information received in regard to TWC's proposed business combination with
FlashNet confidential.

Any assignment, transfer, pledge, hypothecation or other disposition of the
rights or any attempt to make any such levy of execution, attachment or other
process will cause the rights, automatically and without any action by HLN,
to terminate immediately upon the happening of any such event, provided,
however, that any such termination of the rights or either of them under the
foregoing provisions of this Section will not prejudice any rights or
remedies which HLN may have under this Agreement or otherwise.

         3. ACQUISITION OF INTERESTS IN VISION TEK, L.P. or HLN. TWC agrees,
represents and warrants that it will acquire all interests in Vision Tek,
L.P. or HLN that he may acquire from the owners thereof in compliance with
all applicable federal and state laws regulating the offer and sale of
securities.

         4. NOTICES. All notices under this Agreement are to be delivered by
(i) depositing the notice in the mail, using registered mail, return receipt
requested, addressed to the address below or to any other address as the
party may designate by providing notice, (ii) telecopying the notice by using
the telephone number set forth below or any other telephone number as the
party may designate by providing notice, (iii) overnight delivery service
addressed to the address below or to any other address as the party may
designate by providing notice, or (iv) hand delivery to the individual
designated below or to any other individual as the party may designate by
providing notice. The notice shall be deemed delivered (i) if by registered
mail, four (4) days after the notice's deposit in the mail, (ii) if by
telecopy, on the date the notice is delivered, (iii) if by overnight delivery
service, on the day of delivery, and (iv) if by hand delivery, on the date of
hand delivery.

If to HLN:

HyperLight Network Corporation
188 North Lake Drive
Naples, Florida 34102
Attention: J. Mark Strong - President
Telecopy No.: 941-403-3528

with a copy (which does not constitute notice) to:

Norton - Lidstone, LLC
Suite 850, The Quadrant
5445 DTC Parkway
Englewood, CO 801 11
Attn: Herrick K. Lidstone, Jr., Esq.

HYPERLIGHT NETWORK CORPORATION INTERIM FUNDING AGREEMENT                  PAGE 2

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Telecopy: 303-221-5553

and to

Wollins, Hellman & Green
720 South Colorado Blvd
Suite 620-S
Denver, CO 80222
Attn: David H. Wollins, Esq.
Telecopy: 303-758-81 11

If to TWC:

Telecom Wireless Corporation
5299 DTC Blvd, 12" Floor
Englewood, CO 801 11
Attention: Jay W. Enyart, Esq. - Corporate Counsel
Telecopy No.: 303-357-0190

         5. GOVERNMENTAL AND OTHER REGULATIONS. The exercise of the rights,
and TWC's and HLN's performance of their respective obligations hereunder is
subject to all applicable federal and state laws, rules and regulations, and
to such approvals by any regulatory or governmental agency which may, in the
opinion of counsel, be required.

         6. CORPORATE APPROVALS. By executing this Agreement, the undersigned
represent and warrant to the other that it has obtained all necessary
corporate approvals, and that this agreement is a legal, valid, and binding
agreement of the respective signatories.

IN WITNESS WHEREOF, HLN and TWC have caused this Agreement to be executed in
their respective names by their respective Presidents, as of the date first
above written.

HYPERLIGHT NETWORK CORPORATION                  TELECOM WIRELESS CORPORATION
(Seal)

By:  /s/ J. Mark Strong                         By:  /s/ James C. Roberts
   ---------------------------------               --------------------------
   J. Mark Strong, President                       James C. Roberts, President

HYPERLIGHT NETWORK CORPORATION INTERIM FUNDING AGREEMENT                  PAGE 3

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