Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Acer Technology Ventures Management, LLC
  2. Issuer Name and Ticker or Trading Symbol
IROBOT CORP [IRBT]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
5201 GREAT AMERICA PARKWAY, SUITE 270
3. Date of Earliest Transaction (Month/Day/Year)
09/18/2006
(Street)

SANTA CLARA, CA 95054
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 09/18/2006   S(1)   700 D $ 22.19 675,800 I See Footnote (2)
Common Stock               1,658,136 I See Footnote (3)
Common Stock               48,000 I See Footnote (4)
Common Stock               2,000 I See Footnote (5)
Common Stock               4,000 I See Footnote (6)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Acer Technology Ventures Management, LLC
5201 GREAT AMERICA PARKWAY
SUITE 270
SANTA CLARA, CA 95054
    X    
IP Fund One, L.P.
5201 GREAT AMERICA PARKWAY
SUIT 270
SANTA CLARA, CA 95054
    X    
Lai Teh-Tsung
C/O ID AMERICA 1, LLC
5201 GREAT AMERICA PARKWAY
SANTA CLARA, CA 95054
    X    
iD America 1, LLC
5201 GREAT AMERICA PARKWAY
SUITE 270
SANTA CLARA, CA 95054
    X    
Acer Technology Ventures Fund, L.P.
5201 GREAT AMERICA PARKWAY
SUITE 270
SANTA CLARA, CA 95054
    X    
Lu James C
C/O ACER TECHNOLOGY VENTURES MANAGEMENT
5201 GREAT AMERICA PARKWAY, SUITE 270
SANATA CLARA, CA 95054
    X    
iD6 Fund, L.P.
5201 GREAT AMERICA PARKWAY
SUITE 270
SANTA CLARA, CA 95054
    X    
Acer Technology Ventures America, LLC
5201 GREAT AMERICA PARKWAY
SUITE 270
SANTA CLARA, CA 95054
    X    

Signatures

 (See signatures included in Exhibit 99.1)   09/19/2006
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

 /s/ Glen D. Weinstein, Attorney-in-fact   11/15/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2006.
(2) Consists of shares indirectly held by Acer Technology Ventures America, LLC as general partner for IP Fund One, L.P. The reporting persons disclaim beneficial ownership of such shares except to the extent of their pecuniary interest, if any, and this report shall not be deemed an admission that the reporting person are the beneficial owners of all of the reported shares for purposes of Section 16 or any other purpose.
(3) Consists of shares held indirectly by James C. Lu as principal of Acer Technology Ventures Management, LLC and Acer Technology Ventures Management, LLC as general partner for Acer Technology Venutres Fund, L.P. The reporting persons disclaim beneficial ownership of such shares except to the extent of their pecuniary interest, if any, and this report shall not be deemed an admission that the reporting person are the beneficial owners of all of the reported shares for purposes of Section 16 or any other purpose.
(4) Consists of shares indirectly held by Teh-Tsung Lai as principal of iD America 1, LLC and iD America 1, LLC as general partner for iD6 Fund, L.P. The reporting persons disclaim beneficial ownership of such shares except to the extent of their pecuniary interest, if any, and this report shall not be deemed an admission that the reporting person are the beneficial owners of all of the reported shares for purposes of Section 16 or any other purpose.
(5) Consists of shares held directly by Teh-Tsung Lai.
(6) Consists of shares held directly by James C. Lu.

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