Document:

<PAGE>
                                                                     EXHIBIT 4.8

                               FIRST AMENDMENT TO
                              INVESTMENT AGREEMENT

     This Amendment, dated as of February __, 2003 (the "Amendment"), to the
Investment Agreement, dated April 28, 2000 (the "Investment Agreement") is
entered into among iDine Rewards Network Inc. (formerly known as Transmedia
Network Inc.), a Delaware corporation (the "Company"), Minotaur Partners II,
L.P., an Illinois limited partnership ("MP II"), ValueVision International Inc.,
a Minnesota corporation, Dominic Mangone and Raymond Bank (each of the foregoing
parties, other than the Company, individually, an "Investor" and collectively,
the "Investors").

     WHEREAS, simultaneously with the execution of this Amendment, the parties
hereto and Samstock, L.L.C. are terminating that certain Co-Sale and Voting
Agreement, dated as of April 28, 2000 (the "Co-Sale and Voting Agreement"),
among the Company, the Investors and Samstock, L.L.C.;

     WHEREAS, the parties wish to amend the Investment Agreement to reflect the
termination of the Co-Sale and Voting Agreement and to make certain other
changes to the Investment Agreement;

     NOW, THEREFORE, in consideration of the promises and the mutual agreements
contained herein, the parties hereto agree as follows:

     1. All references to the Co-Sale and Voting Agreement contained in the
Investment Agreement are hereby deleted in their entirety.

     2. Article IV of the Investment Agreement is hereby deleted in its entirety
and replaced by the phrase "Intentionally Omitted."

     3. All references to Article IV contained in the Investment Agreement are
hereby deleted in their entirety.

     4. Section 5.2(b) will not apply to any Minotaur Contracting Party.

     5. In connection with the distribution of the Shares and Warrants to its
partners, MP II may assign to its general partners, consistent with Section 5.8,
the right to require the Company to register Registrable Securities as provided
in Article V of the Investment Agreement.

     6. Amendment of Section 7.2. Section 7.2 is hereby amended to read in its
entirety as follows:

     "Section 7.2. Until they may be sold without compliance with subsections
(c), (d), (e), (f) and (h) of Rule 144 under the Act:

     (a) Certificates representing any Shares or Warrant Shares shall contain a
legend in substantially the following form:

<PAGE>

     "The securities evidenced by this certificate have not been registered
     under the Securities Act of 1933, as amended (the "Act"), or applicable
     state securities laws and may not be sold, transferred, assigned, offered,
     pledged or otherwise disposed of unless (i) there is an effective
     registration statement under such Act and such laws covering such
     securities or (ii) such sale, transfer, assignment, offer, pledge or other
     disposition is exempt from the registration and prospectus delivery
     requirements of such Act and such laws."

     (b) Each Warrant shall contain a legend in substantially the form indicated
on the form of Warrant attached as Exhibit A to the Stock Purchase and Sale
Agreement, dated as of April 28, 2000, among the Company and the Investors."

     7. Pursuant to Section 7.4, MP II, prior to transferring any Shares or
Warrant Shares or Warrants, will cause each Minotaur Investor to whom such
Shares or Warrant Shares or Warrants are to be transferred, to execute and
deliver to the Company a Joinder Agreement in the form attached hereto as Annex
A.

     8. In connection with any sale in the public markets of Shares or Warrant
Shares by a Minotaur Contracting Party to any purchaser who is not a Minotaur
Investor or otherwise a party to the Investment Agreement, such purchaser shall
not be deemed to be an assignee under the Investment Agreement and shall not
have any rights or assume any obligations thereunder, and shall not be obligated
to sign a Joinder Agreement.

     9. Except as amended herein, the Investment Agreement shall remain in full
force and effect.

     10. MP II has delivered to the Company the resignation of its designee to
the Board of Directors which becomes effective as of the effective date of the
Amendment, and MP II shall have no further right to designate a Director to
serve on the Board of Directors of the Company.

     11. The Amendment shall become effective on February __, 2003.

                            [Signature Page Follows]

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
as of the date first written above.

                                       IDINE REWARDS NETWORK INC.

                                       By:______________________________________
                                          Name:
                                          Title:

                                       MINOTAUR PARTNERS II, L.P.

                                       By:______________________________________
                                          Name:
                                          Title:

                                       VALUEVISION INTERNATIONAL INC.

                                       By:______________________________________
                                          Name:
                                          Title:

                                       _________________________________________
                                       Dominic Mangone

                                       _________________________________________
                                       Raymond Bank

<PAGE>

                                                                         Annex A

                               Joinder Agreement

iDine Rewards Network Inc.

Minotaur Partners II, L.P.

ValueVision International Inc.

Dominic Mangone

Raymond Bank

Re:  Investment Agreement, dated as of April 28, 2000, as amended by the First
     Amendment to Investment Agreement, dated as of January __, 2003, (the
     "Agreement"), among iDine Rewards Network Inc. (the "Company"), Minotaur
     Partners II, L.P. ("MP II"), ValueVision International Inc., Dominic
     Mangone and Raymond Bank

Ladies and Gentlemen:

          Pursuant to Section 7.4 of the above-referenced Agreement the
undersigned, as a transferee from MP II of Shares of Common Stock and/or
Warrants of the Company, agrees to be legally bound by the Agreement to the same
extent as if he had signed the Agreement as an original signatory as a Minotaur
Investor.

Executed as of the ____ day of _____________ , 2003.

                                                            Very Truly Yours,

                                                            ____________________
                                                            Name:<PAGE>

                                                                   Exhibit 10.24

                           iDine Rewards Network, Inc.
                            11900 Biscayne Boulevard
                         North Miami, Florida 33181-9915

                               September 25, 2002

Mr. George Wiedemann
1476 Hamilton Avenue
Palo Alto, California 94301

      Re:  Employment Contract
           -------------------

Dear George:

   On behalf of iDine Rewards Network, Inc. (the "Company"), we are very pleased
to offer you the position of President and Chief Executive Officer. In this
position, you will report directly to the Board of Directors.

   The terms of our offer include the following:

   1. Duties and Responsibilities - As President and Chief Executive Officer,
you will be responsible for the day-to-day management and operating decisions of
the Company. In addition, you will have full responsibility for all personnel
decisions and for the execution of the Company's business plan, consistent with
the authority granted by the Company's by-laws. The primary situs of your work
will be Miami, Florida unless otherwise directed by the Board of Directors.
Pending relocation to Southeast Florida as provided for below, the Company shall
reimburse you for the reasonable expenses of commuting weekly between your
current home and Miami as well as lodging and a rental car in Miami during the
work week.

   2. Board Seat - You will continue to hold your seat on the Board of Directors
during your employment hereunder.

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 2

   3. Starting Date - You will start employment concurrent with the resignation
of the current President and CEO of the Company.

   4. Base Salary - Your annual base salary is $500,000 and is paid periodically
in accordance with the Company's payroll practices. Your compensation (both base
salary and target bonus) will be reviewed to determine increase, if any, at the
end of 2003 and annually thereafter.

   5. Annual Bonus - Commencing with fiscal year 2003, your annual target cash
bonus opportunity shall be up to 100% of your base salary. Based upon the
achievement of specific goals to be set and agreed to between you and the Board
of Directors by the end of 2002 and annually each year thereafter for so long as
this Agreement remains in effect, you may earn from zero up to 100% of your
annual target bonus amount. Any bonus award for a fiscal year shall be
calculated and paid during the first fiscal quarter of the following fiscal
year. Your bonus, if any, for the period through the end of 2002 shall be in the
discretion of the Board of Directors.

   6. Incentive Compensation - Subject to the terms and conditions of the
Company's existing 1996 Long Term Incentive Plan, as amended ("LTIP") and the
further provisions of this Paragraph 6, you will receive an option to purchase
1,000,000 shares of the Company's common stock at a price per share equal to the
10-day trailing average of the closing price per share as of the starting date
of your employment. The option shall vest over 4 years, with the first 25%
vesting on September 30, 2003, and another 25% vesting on each September 30/th/
thereafter. To the extent vested, the option shall remain exercisable by you for
ten years following the date of the grant (subject to reasonable trading
restrictions during Executive's employment hereunder as

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 3

promulgated by the Board of Directors within 60 days after the date of this
Agreement), or in the event of the termination of your employment for the period
provided in the LTIP. All unvested options shall terminate upon the termination
of your employment for any reason. In the reasonable discretion of the Board of
Directors, within 60 days after the date of this Agreement, the incentive
compensation provided for in this Paragraph 6 may be modified, in whole or in
part, so long as the result is substantially equivalent in value to that which
is provided for above.

   7. Employee Benefits - In addition to all normal Company benefit plans, you
will participate in the following Executive Benefit Plan:

  .   Severance Arrangements - If your employment is terminated by the Company
      for any reason other than "Cause" (as defined below), disability or
      death: (i) you will receive your annual bonus (to the extent actually
      achieved) for that fiscal year prorated for that year based on the
      portion of active employment for the year; (ii) you will receive payments
      equal to twelve months base salary, plus an amount equal to the average
      of your annual bonus (if any) for each of the prior full fiscal years up
      to three such years (paid pursuant to Company's normal payroll
      practices); (iii) you will have the option to continue coverage in the
      Company's health care plan for the statutory period provided by COBRA and
      the Company will pay for your costs associated with such participation;
      and (iv) prior to the second anniversary of your starting date, the
      Company will provide accelerated vesting of your options on a pro rata
      basis (using the actual period elapsed from your start date to the date
      of termination divided by two years).

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 4

   The Company will require that you sign and comply with a Termination
   Agreement as a condition of receiving severance benefits. The Termination
   Agreement will include a Non-compete Agreement (as described in Paragraph 9
   below), a general mutual release of liability and a covenant not to sue the
   Company or any affiliated company or any officer, director or employee
   thereof (except with respect to compliance with this Agreement). You will be
   deemed to have been terminated without Cause if there is any material
   diminution of the scope of your duties and responsibilities or a reduction in
   your base salary, target bonus, bonus plan parameters and a reduction, not
   applicable to executive employees generally, in employee welfare benefits (it
   being understood that the changes, if any, in employee welfare benefits shall
   be viewed in their entirety and not on a plan by plan basis).

   A `material diminution' in the scope of your duties and responsibilities
   shall be deemed to have occurred when the Company has failed to elect or
   reelect you as a member of the Board of Directions or removes you from such
   position (in any such case, other than for Cause), or has assigned you duties
   which are materially inconsistent with your duties as the President and CEO.

   "Cause" shall mean (a) your willful failure to substantially perform the
   duties hereunder, (b) your willful failure to follow a written, lawful order
   or written directive from the Board of Directors or Chairman of the Board of
   Directors, or (c) your conviction of a felony of any kind or any misdemeanor
   involving moral turpitude. Your receipt of any severance payments or benefits
   hereunder shall be conditioned upon your compliance with the non-compete
   provisions below.

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 5

  .   Change of Control - Upon a Change of Control event as defined in the
      LTIP, or in the event Samuel Zell is no longer Chairman of the Board of
      Directors of the Company (other than by reason of death or disability),
      and for a period of one year after such date, if you are terminated by
      the Company other than for Cause, disability or death, (i) the lump sum
      severance payment will be eighteen months base salary from the separation
      date plus the greater of the guaranteed bonus for that year (if any) or
      the pro rata portion of the full bonus potential for that year, (ii) any
      options not theretofore vested shall vest, and (iii) you shall be
      entitled, for a 12-month period (or shorter if you receive coverage and
      benefits under the plans and program of a subsequent employer) to
      continue participation in employee welfare benefit plans in which you
      were participating on the termination date. You shall be deemed to have
      been terminated without Cause if, after a Change of Control, there is any
      material diminution of the scope of your duties and responsibilities or a
      reduction in your base salary, target bonus, bonus plan parameters and a
      reduction, not applicable to executive employees generally, in employee
      welfare benefits (it being understood that the changes, if any, in
      employee benefits shall be viewed in their entirety and not on a plan by
      plan basis).

  .   Annual Physical Examination - You shall be entitled to a comprehensive
      physical on an annual basis at Company expense.

   8. Relocation Benefits - If requested by the Board of Directors and as a
condition of this offer, you shall relocate your permanent residence to
Southeast Florida. Until requested to relocate, the Company shall reimburse you
for reasonable expenses for commuting between your

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 6

current home and Miami, Florida. To assist you in this relocation, the Company
will provide the following relocation benefits:

  .   Temporary Housing - The Company will reimburse you for temporary living
      costs for your family for a period up to 90 days from the date of the
      request by the Board.

  .   Househunting Trips - The Company will reimburse reasonable airfare, hotel,
      car rental and meal expenses for you and your spouse.

  .   Sale of Present Residence - The Company will reimburse you for all closing
      costs in connection with the sale of your residence in Palo Alto,
      California. If within 90 days from the date you make your present
      residence available for sale no satisfactory offers are received, the
      Company will facilitate the purchase of your home on terms satisfactory to
      you and the Company. Such purchase may be facilitated through a third
      party relocation company.

  .   Closing Costs on Purchase of New Home - The Company will reimburse you for
      all closing costs in connection with the purchase of a home in Southeast
      Florida.

  .   Movement of Household Goods - The Company will reimburse you for the costs
      of transporting your household goods from Palo Alto, California to
      Southeast Florida.

  .   Reimbursement Gross Up - Reimbursement of any relocation costs incurred
      will be grossed up to cover applicable taxes.

   9. Non-Compete - In the event you voluntarily or involuntarily leave the
Company's employ, for a period of one year following your termination date or,
if longer, for as long as you are receiving severance payments and benefits as
provided above, you will not directly or indirectly (i) be employed by, invest
in (except less than 5% of a publically traded company),

<PAGE>

                                                            Mr. George Wiedemann
                                                              September 25, 2002
                                                                          Page 7

have an interest in or perform work as a director, officer, independent
contractor, partner or consultant for any business in which the Company or any
of its wholly owned, directly or indirectly, affiliates is engaged at such date
in any geographic region in which the Company conducts business or as to which
the Company has currently targeted for expansion; or (ii) on behalf of yourself
or any business with which you may be associated, offer employment or a
consulting relationship to any person who is an employee of or a consultant to
the Company or any of its wholly owned, directly or indirectly, affiliates.

   10. Confidentiality - You shall treat as confidential and not disclose to any
person not affiliated with the Company all non-public and proprietary
information and data about the business, operations, employees, programs, plans
and financial results, projections and budgets of the Company and its affiliates
which are disclosed to you during your employment. This confidentiality
agreement shall survive the termination of your employment for any reason.

   On behalf of the entire Board of Directors, we are delighted to offer you the
President and CEO position, George, and we look forward to your joining our
team. If you have any questions, please contact me directly at 312-454-0100.

                                              Sincerely,

                                              -------------------------------
                                              Samuel Zell, Chairman of the Board

                                              Agreed and Accepted:

                                              By:
                                                  -----------------------------
                                                  George Wiedemann

                                              Date: September 25, 2002

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00050-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00050-of-00352.parquet"}]]