Document:

a21, Inc.
                             7660 Centurion Parkway
                             Jacksonville, FL 32256

                                          October 4, 2005

[Insert Name/Address of Investor]

            Re:   Common Stock Purchase Warrants

Dear _____:

            Reference is made to the Common Stock Purchase Warrants issued to
Barron Partners L.P. by a21, Inc., copies of which are attached hereto as
Exhibit A (the "Warrants") of which Warrants to purchase up to _________ shares
of a21 common stock we understand were transferred to you. For good and valuable
consideration the sufficiency of which is hereby acknowledged, the "Exercise
Price per Share" stated in each of the Warrants is reduced to $0.185 provided
the Warrants are exercised and the foregoing Exercise Price per Share paid to
a21, Inc. within two business days of the execution of this letter.

                                          Very truly yours,

                                          Thomas V. Butta
                                          PresidentTHIS  AMENDED  AND  RESTATED  COMMON  STOCK  PURCHASE  WARRANT  HAS NOT BEEN
    REGISTERED  UNDER THE  SECURITIES  ACT OF 1933 ACT,  AS  AMENDED  (THE "1933
    ACT").  THE HOLDER HEREOF,  BY PURCHASING  THIS AMENDED AND RESTATED  COMMON
    STOCK  PURCHASE  WARRANT,  AGREES FOR THE BENEFIT OF THE  COMPANY  THAT SUCH
    SECURITIES  MAY BE OFFERED,  SOLD OR OTHERWISE  TRANSFERRED  ONLY (A) TO THE
    COMPANY,  (B) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE 1933 ACT,
    OR (C) IF REGISTERED  UNDER THE 1933 ACT AND ANY APPLICABLE STATE SECURITIES
    LAWS.

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

                                    a21, Inc.
                              AMENDED AND RESTATED
                          COMMON STOCK PURCHASE WARRANT

Number of shares:   4,000,000
                                       Holder:  CRT  Capital   Group LLC
                                                262 Harbor Drive
                                                Stamford, Connecticut 06902

Expiration Date:    March 31, 2006 (or earlier, as adjusted)

Exercise Price per Share:  $0.25 (or greater, as adjusted)

a21, Inc., a company organized and existing under the laws of the State of Texas
(the "Company"),  hereby  certifies that, for value received,  CRT Capital Group
LLC, or its registered assigns (the "Warrant Holder"),  is entitled,  subject to
the terms set forth below,  to purchase from the Company  4,000,000  shares (the
"Warrant Shares") of common stock, $0.001 par value (the "Common Stock"), of the
Company (each such share,  a "Warrant  Share" and all such shares,  the "Warrant
Shares") in exchange for (a) one (1) Warrant and (b) $0.25 per Warrant Share (as
adjusted  from time to time as provided in Sections 6 and 7), per Warrant  Share
(the  "Exercise  Price"),  at any time and from  time to time from and after the
date  thereof and through and  including  5:00 p.m.  New York City time upon the
earlier to occur of (a) March 31,  2006,  and (b) ten (10) days,  or twenty (20)
days if the Warrant  Shares are not then  Eligible  for Resale,  as  hereinafter
defined,  pursuant to a registration statement under the Securities Act of 1933,
as amended, declared effective by the Securities and Exchange Commission,  after
written notice from a21 to the Warrant Holder that the five-day  Volume Weighted
Average Price  ("VWAP"),  as  hereinafter  defined,  is greater than or equal to
forty cents ($0.40) (the "Expiration  Date"), and subject to the following terms
and conditions:

<PAGE>

      1.  Registration of Warrant.  The Company shall register this Warrant upon
records  to be  maintained  by  the  Company  for  that  purpose  (the  "Warrant
Register"),  in the name of the record  Warrant Holder hereof from time to time.
The Company may deem and treat the registered  Warrant Holder of this Warrant as
the  absolute  owner  hereof  for the  purpose  of any  exercise  hereof  or any
distribution to the Warrant Holder, and for all other purposes,  and the Company
shall not be affected by notice to the contrary.

      2. Investment Representation. The Warrant Holder by accepting this Warrant
represents that the Warrant Holder is acquiring this Warrant for its own account
or the account of an affiliate for investment  purposes and not with the view to
any  offering  or  distribution  and that the  Warrant  Holder  will not sell or
otherwise dispose of this Warrant or the underlying  Warrant Shares in violation
of  applicable  securities  laws.  The  Warrant  Holder  acknowledges  that  the
certificates  representing any Warrant Shares will bear a legend indicating that
they have not been registered under the United States Securities Act of 1933, as
amended  (the  "1933  Act")  and may not be sold by the  Warrant  Holder  except
pursuant to an effective registration statement or pursuant to an exemption from
registration  requirements  of the 1933 Act and in  accordance  with federal and
state  securities  laws.  If this  Warrant was  acquired  by the Warrant  Holder
pursuant to the exemption  from the  registration  requirements  of the 1933 Act
afforded by  Regulation  S  thereunder,  the  Warrant  Holder  acknowledges  and
covenants  that this  Warrant may not be  exercised  by or on behalf of a Person
during the one year distribution  compliance period (as defined in Regulation S)
following the date hereof.  "Person"  means an  individual,  partnership,  firm,
limited liability company, trust, joint venture,  association,  corporation,  or
any other legal entity.

      3.  Validity of Warrant and Issue of Shares.  The Company  represents  and
warrants  that this  Warrant has been duly  authorized  and  validly  issued and
warrants  and agrees  that all of the Common  Stock that may be issued  upon the
exercise of the rights  represented by this Warrant will,  when issued upon such
exercise,  be duly authorized,  validly issued, fully paid and nonassessable and
free from all taxes,  liens and charges with respect to the issue  thereof.  The
Company  further  warrants  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  a  sufficient  number of Common  Stock to
provide for the exercise of the rights represented by this Warrant.

      4. Registration of Transfers and Exchange of Warrants.

             a. Subject to  compliance  with the legend set forth on the face of
this  Warrant,  the Company  shall  register the transfer of any portion of this
Warrant in the Warrant Register, upon surrender of this Warrant with the Form of
Assignment  attached  hereto duly  completed  and signed,  to the Company at the
office  specified  in or  pursuant to Section 9. Upon any such  registration  or
transfer,  a new warrant to purchase Common Stock, in substantially  the form of
this Warrant (any such new warrant, a "New Warrant"),  evidencing the portion of
this Warrant so transferred  shall be issued to the transferee and a New Warrant
evidencing  the remaining  portion of this Warrant not so  transferred,  if any,
shall be issued to the  transferring  Warrant Holder.  The acceptance of the New
Warrant  by the  transferee  thereof  shall be  deemed  the  acceptance  of such
transferee  of all of the  rights  and  obligations  of a  Warrant  Holder  of a
Warrant.

<PAGE>

             b. This Warrant is  exchangeable,  upon the surrender hereof by the
Warrant Holder to the office of the Company  specified in or pursuant to Section
9 for one or more  New  Warrants,  evidencing  in the  aggregate  the  right  to
purchase the number of Warrant Shares which may then be purchased hereunder. Any
such New Warrant will be dated the date of such exchange.

      5. Exercise of Warrants.

             a. Upon  surrender  of this  Warrant  with the Form of  Election to
Purchase  attached  hereto  duly  completed  and signed to the  Company,  at its
address set forth in Section 9, and upon  payment and  delivery of the  Exercise
Price per  Warrant  Share  multiplied  by the number of Warrant  Shares that the
Warrant  Holder  intends to purchase  hereunder,  in lawful  money of the United
States of America,  in cash or by certified or official bank check or checks, to
the Company,  all as specified by the Warrant  Holder in the Form of Election to
Purchase,  the Company shall promptly (but in no event later than seven business
days after the Date of Exercise as defined  herein)  issue or cause to be issued
and cause to be delivered to or upon the written order of the Warrant Holder and
in such  name or names as the  Warrant  Holder  may  designate  (subject  to the
restrictions  on transfer  described in the legend set forth on the face of this
Warrant), a certificate for the Warrant Shares issuable upon such exercise, with
such restrictive legend as required by the 1933 Act. Any person so designated by
the  Warrant  Holder to receive  Warrant  Shares  shall be deemed to have become
holder of  record of such  Warrant  Shares  as of the Date of  Exercise  of this
Warrant.

             b. "Date of  Exercise"  means the date on which the  Company  shall
have  received (i) this Warrant (or any New Warrant,  as  applicable),  with the
Form of Election to Purchase  attached  hereto (or attached to such New Warrant)
appropriately  completed and duly signed, and (ii) payment of the Exercise Price
for the  number of  Warrant  Shares so  indicated  by the  Warrant  Holder to be
purchased.

             c. This Warrant shall be  exercisable  at any time and from time to
time for such number of Warrant  Shares as is indicated in the attached  Form of
Election  To  Purchase.  If less  than all of the  Warrant  Shares  which may be
purchased  under this Warrant are exercised at any time, the Company shall issue
or cause to be issued,  at its expense,  a New Warrant  evidencing  the right to
purchase the remaining  number of Warrant  Shares for which no exercise has been
evidenced by this Warrant.

      6. Exercise Price.

            a. The  Exercise  Price per Share  shall be  adjusted as provided in
Section 6(i) and (ii),  provided the  Warrants  are  exercised  and the Exercise
Price per Share paid to the  Company  upon the earlier to occur of (a) March 31,

<PAGE>

2006,  and (b) ten (10) days,  or twenty (20) days if the shares of Common Stock
into  which the  Warrants  may be  exercised  are not then  Eligible  for Resale
pursuant  to an  effective  registration  statement  declared  effective  by the
Securities and Exchange Commission, after written notice from the Company to the
Warrant Holder that the five-day VWAP, as hereinafter  defined,  is greater than
or equal to forty cents ($0.40):

            (i) If the  shares  Common  Stock  into  which  the  Warrant  may be
exercised  are  Eligible  for  Resale  pursuant  to  an  effective  registration
statement,  then the  Exercise  Price  per  Share  shall be the  greater  of (i)
twenty-five  cents ($0.25),  and (ii) eighty percent (80%) of the five-day VWAP;
and

            (ii) If the shares of Common  Stock into which the  Warrants  may be
exercised  are not  Eligible for Resale  pursuant to an  effective  registration
statement,  then the  Exercise  Price  per  Share  shall be the  greater  of (i)
twenty-five cents ($0.25),  and (ii) sixty percent (60%) of the five-day VWAP if
the Warrant is exercised and the applicable Exercise Price per Share paid to the
Company  on or before  December  31,  2005,  and  seventy  percent  (70%) of the
five-day VWAP if the Warrant is exercised and the applicable  Exercise Price per
Share paid to the Company after December 31, 2005.

            b. For the  purposes  hereof,  "VWAP"  means  the  weighted  average
selling  price  of the  Common  Stock  for five  consecutive  Trading  Days,  as
hereinafter  defined,  weighted by the number of shares of Common  Stock sold at
each such price.  "Trading Day" shall mean any day on which the shares of Common
Stock  are  traded on their  principal  trading  market.  For  purposes  of this
Warrant,  Eligible  for Resale  means that shares of Common  Stock may be resold
under an  effective  Registration  Statement  and  that  (i)  such  Registration
Statement is not interfered with by any stop order, injunction or other order or
requirement  of the  Securities  and Exchange  Commission or other  governmental
agency or court for any reason,  (ii) the Company has not notified any holder of
its  securities or its transfer agent of the occurrence of any event as a result
of which the  prospectus  included in such  Registration  Statement  contains an
untrue  statement  of a material  fact or omits any fact  necessary  to make the
statements  therein  not  misleading,  or  (iii) no act or  omission  to act has
occurred  which would  otherwise  prohibit  or prevent the lawful  resale of the
Common Stock under such Registration Statement.

      7. Adjustment of Exercise Price and Number of Shares. The character of the
shares of stock or other  securities  at the time issuable upon exercise of this
Warrant and the Exercise Price therefor,  are subject to further adjustment upon
the occurrence of the following events:

            a. Adjustment for Stock Splits, Stock Dividends,  Recapitalizations,
Etc. The Exercise Price of this Warrant and the number of shares of Common Stock
or other  securities at the time issuable upon exercise of this Warrant shall be
appropriately adjusted to reflect any stock dividend,  stock split,  combination
of shares,  reclassification,  recapitalization or other similar event affecting
the number of outstanding shares of stock or securities.

<PAGE>

            b. Adjustment for  Reorganization,  Consolidation,  Merger,  Etc. In
case of any  consolidation  or  merger  of the  Company  with or into any  other
corporation,  entity or person, or any other corporate reorganization,  in which
the  Company  shall  not  be  the   continuing  or  surviving   entity  of  such
consolidation,  merger or reorganization (any such transaction being hereinafter
referred  to as a  "Reorganization"),  then,  in each  case,  the holder of this
Warrant, on exercise hereof at any time after the consummation or effective date
of such  Reorganization  (the "Effective Date"),  shall receive,  in lieu of the
shares of stock or other  securities  at any time  issuable upon the exercise of
the Warrant issuable on such exercise prior to the Effective Date, the stock and
other  securities and property  (including cash) to which such holder would have
been entitled upon the Effective  Date if such holder had exercised this Warrant
immediately prior thereto (all subject to further adjustment as provided in this
Warrant).

            c.  Certificate  as to  Adjustments.  In case of any  adjustment  or
readjustment in the price or kind of securities issuable on the exercise of this
Warrant  under this  Section,  the Company will  promptly  give  written  notice
thereof to the holder of this  Warrant in the form of a  certificate,  certified
and  confirmed  by the Board of Directors  of the  Company,  setting  forth such
adjustment or readjustment and showing in reasonable detail the facts upon which
such adjustment or readjustment is based.

      8. Fractional  Shares. The Company shall not be required to issue or cause
to be issued  fractional  Warrant  Shares on the exercise of this  Warrant.  The
number of full Warrant  Shares that shall be issuable  upon the exercise of this
Warrant  shall be  computed  on the basis of the  aggregate  number of  Warrants
Shares purchasable on exercise of this Warrant so presented.  If any fraction of
a Warrant Share would,  except for the provisions of this Section 8, be issuable
on the exercise of this Warrant,  the Company shall,  at its option,  (i) pay an
amount in cash equal to the Exercise  Price  multiplied by such fraction or (ii)
round the number of Warrant Shares issuable, up to the next whole number.

      9.  Notice.  All notices and other  communications  hereunder  shall be in
writing  and  shall be  deemed  to have  been  given  (i) on the  date  they are
delivered  if  delivered  in  person;  (ii) on the date  initially  received  if
delivered by facsimile  transmission  followed by registered  or certified  mail
confirmation;  (iii) on the date delivered by an overnight  courier service;  or
(iv) on the third  business  day after it is mailed by  registered  or certified
mail, return receipt requested with postage and other fees prepaid as follows:

                  If to the Company:

                  a21, Inc.
                  7660 Centurion Parkway
                  Jacksonville, Florida  32256
                  Direct Dial:  904-565-0066
                  Facsimile:  904-565-1620

<PAGE>

                  If to the Warrant Holder:

                  To the address in this  Warrant or to the address  provided to
                  the Company by an Investor.

      10. Miscellaneous.

             a. This Warrant shall be binding on and inure to the benefit of the
parties  hereto and their  respective  successors  and permitted  assigns.  This
Warrant may be amended only in writing and signed by the Company and the Warrant
Holder.

             b. Nothing in this Warrant shall be construed to give to any person
or  corporation  other  than the  Company  and the  Warrant  Holder any legal or
equitable  right,  remedy or cause of action  under this  Warrant;  this Warrant
shall be for the sole and  exclusive  benefit  of the  Company  and the  Warrant
Holder.

             c. This  Warrant  shall be governed by,  construed  and enforced in
accordance with the internal laws of the State of New York without regard to the
principles of conflicts of law thereof.

             d. The headings herein are for convenience  only, do not constitute
a part of this  Warrant  and shall  not be deemed to limit or affect  any of the
provisions hereof.

             e. In case any one or more of the  provisions of this Warrant shall
be invalid or unenforceable in any respect,  the validity and  enforceablilty of
the  remaining  terms and  provisions  of this  Warrant  shall not in any way be
affected or impaired thereby and the parties will attempt in good faith to agree
upon a valid and enforceable provision which shall be a commercially  reasonably
substitute  therefore,  and upon so agreeing,  shall incorporate such substitute
provision in this Warrant.

             f. The Warrant Holder shall not, by virtue  hereof,  be entitled to
any voting or other rights of a  shareholder  of the  Company,  either at law or
equity,  and the rights of the Warrant Holder are limited to those  expressed in
this Warrant.

<PAGE>

      IN  WITNESS  WHEREOF,  the  Company  has  caused  this  Warrant to be duly
executed by the authorized officer as of the date first above stated.

      a21, Inc.

      By:
           -------------------------------

      Name:
             -----------------------------

      Title:
              ----------------------------------

<PAGE>

--------------------------
Signature Guaranteed

                               FORM OF ASSIGNMENT

               To Be Executed by the Registered Warrant Holder
                           in Order to Assign Warrants

  FOR VALUE RECEIVED, ____________________ hereby sells, assigns and transfers
  unto

          PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER

                           ------------------------
                   [please print or type name and address]

_________________________   of  the   Warrants   represented   by  this  Warrant
Certificate,     and    hereby    irrevocably     constitutes    and    appoints
____________________________________ _______________________________ Attorney to
transfer this Warrant  Certificate on the books of the Company,  with full power
of substitution in the premises.

Dated:      ____________________
X________________________

Signature Guaranteed

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

THE SIGNATURE TO THE ASSIGNMENT OR THE SUBSCRIPTION  FORM MUST CORRESPOND TO THE
NAME AS WRITTEN UPON THE FACE OF THIS WARRANT  CERTIFICATE IN EVERY  PARTICULAR,
WITHOUT  ALTERATION  OR  ENLARGEMENT  OR ANY  CHANGE  WHATSOEVER,  AND  MUST  BE
GUARANTEED  BY A  COMMERCIAL  BANK OR  TRUST  COMPANY  OR A  MEMBER  FIRM OF THE
AMERICAN  STOCK  EXCHANGE,  NEW YORK STOCK  EXCHANGE,  PACIFIC STOCK EXCHANGE OR
MIDWEST STOCK EXCHANGE.

                                       8
<PAGE>

                          FORM OF ELECTION TO PURCHASE

(To be executed by the Warrant  Holder to exercise the right to purchase  shares
of Common Stock under the foregoing Warrant)

To:  a21, Inc.:

In accordance with the Warrant  enclosed with this Form of Election to Purchase,
the undersigned hereby irrevocably elects to purchase  ______________  shares of
Common Stock ("Common  Stock"),  $0.001 par value, of a21, Inc. and encloses one
warrant and $0.25 (as  adjusted)  for each Warrant  Share being  purchased or an
aggregate of  $________________  in cash or certified or official  bank check or
checks,  which sum  represents  the aggregate  Exercise Price (as defined in the
Warrant) together with any applicable taxes payable by the undersigned  pursuant
to the Warrant.

The  undersigned  requests  that  certificates  for the  shares of Common  Stock
issuable upon this exercise be issued in the name of:

____________________________________

____________________________________

(Please print name and address)

____________________________________

____________________________________

(Please insert Social Security or Tax Identification Number)

If the number of shares of Common Stock issuable upon this exercise shall not be
all of the shares of Common Stock which the  undersigned is entitled to purchase
in accordance with the enclosed  Warrant,  the  undersigned  requests that a New
Warrant (as defined in the Warrant)  evidencing the right to purchase the shares
of Common Stock not issuable pursuant to the exercise evidenced hereby be issued
in the name of and delivered to:

____________________________________

____________________________________

(Please print name and address)

Dated:                              Name of Warrant Holder:
        ----------------

                                     (Print)
                                            ----------------------------------

                                      (By:)
                                           -----------------------------------

                                     (Name:)
                                             ---------------------------

                                    (Title:)
                                              --------------------------

                                    Signature  must conform in all respects to
                                    name of Warrant  Holder as specified on the
                                    face of the Warrant

                                       9

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