Taken from theXtReMe1 at Xbox 360 IGN forums - he's pretty realiable, and runs a business and a website that specializes in hi-def equipment.
XBOX360CORE Microsoft (X-Box)
B4K-00001 Added on 8/19 Xbox 360 Core System 301.64
XBOX360PLAT Microsoft (X-Box)
B4J-00001 Added on 8/19 Xbox 360 Platinum System 398.04
B4G00001 Microsoft (X-Box)
B4G-00001 Added on 8/19 Wired Controller Xbox 360 29.50
B4F00001 Microsoft (X-Box)
B4F-00001 Added on 8/19 Wireless Controller Xbox 360 36.42
B4B00009 Microsoft (X-Box)
B4B-00009 Added on 8/19 Wireless Network Adapter X360 82.59
B4S00001 Microsoft (X-Box)
B4S-00001 Added on 8/19 VGA HD AV Cable X360 29.50
B4U00001 Microsoft (X-Box)
B4U-00001 Added on 8/19 Rechargeable Battery Pack X360 8.98
B4V00004 Microsoft (X-Box)
B4V-00004 Added on 8/19 Component HD AV Cable Xbox 360 29.24
B4W00001 Microsoft (X-Box)
B4W-00001 Added on 8/19 S-Video AV Cable Xbox 360 21.80
B4Y00027 Microsoft (X-Box)
B4Y-00027 Added on 8/19 Play & Charge Kit Xbox 360 14.88
B4C00001 Microsoft (X-Box)
B4C-00001 Added on 8/19 Memory Unit 64MB Xbox 360 29.24
B4Q00002 Microsoft (X-Box)
B4Q-00002 Added on 8/19 20GB Hard Drive Xbox 360 90.29
G8600 Intec
G8600 Added on 8/4 9.2" TFT Screen Xbox 360 162.62
G8601 Intec
G8601 Added on 8/16 8" TFT Screen Xbox 360 140.56
B4L00002 Microsoft (X-Box)
B4L-00002 Added on 8/19 Faceplates Hot Rod Xbox 360 13.08
B4L00004 Microsoft (X-Box)
B4L-00004 Added on 8/19 Faceplates Flames Xbox 360 13.08
B4L00005 Microsoft (X-Box)
B4L-00005 Added on 8/19 Faceplates Silver Xbox 360 13.08
B4D00001 Microsoft (X-Box)
B4D-00001 Added on 8/19 Headset Xbox 360 14.62
W1800001 Microsoft (X-Box)
W18-00001 Added on 8/19 Xbox 360 Live 12-mon Gold Card 38.48
Z0600040 Microsoft (X-Box)
Z06-00040 Added on 8/19 Xbox 360 Live 12-mon Gold Kit 54.12
ZE400002 Microsoft (X-Box)
ZE4-00002 Added on 8/19 Xbox 360 Live 1-mon Gold Card 6.16
ZE400004 Microsoft (X-Box)
ZE4-00004 Added on 8/19 Xbox 360 Live 3-month Gold Card 15.39
BJ200012 Microsoft (X-Box)
BJ2-00012 Added on 8/19 Xbox 360 Live 3 month Gold Kit 30.78
B4O00001 Microsoft (X-Box)
B4O-00001 Added on 8/19 Universal Media Remote X360 22.06
G8609 Intec
G8609 Added on 8/16 2.1 Sound System X360 48.22
G8618 Intec
G8618 Added on 8/16 A/V Selector & Storage X360 29.75
G8645 Intec
G8645 Added on 8/16 Vertical Stand w/ Storage X360 12.31
G8660 Intec
G8660 Added on 8/16 Pro Gamer's Case X360 29.75
G8664 Intec
G8664 Added on 8/16 10-CD Aluminum Case X360 9.49
G8665 Intec
G8665 Added on 8/16 Game Holder X360 8.72
S7100009 Microsoft (X-Box)
S71-00009 Added on 8/19 Perfect Dark Zero X360 42.58
S7100051 Microsoft (X-Box)
S71-00051 Added on 8/19 Perfect Dark Zero Tin Box X360 51.30
S7400023 Microsoft (X-Box)
S74-00023 Added on 8/19 Kameo X360 42.58
U2500009 Microsoft (X-Box)
U25-00009 Added on 8/19 Project Gotham Racing 3 X360 42.58
This also gives a little more credibility that Xbox first party titles will be $49.99 and there will also be a Perfect Dark Zero collector's edition. Interesting also that they're gonna lose a buck and some change on the core system which will undoubtedly be made back on purchasing the necessary accessories to upgrade it to the non-retarded version. Some retailers will probably force bundles on the core systems, unless you're someone like Wal-Mart who can handle the loss.
XBOX360CORE Microsoft (X-Box)
B4K-00001 Added on 8/19 Xbox 360 Core System 301.64
XBOX360PLAT Microsoft (X-Box)
B4J-00001 Added on 8/19 Xbox 360 Platinum System 398.04
B4G00001 Microsoft (X-Box)
B4G-00001 Added on 8/19 Wired Controller Xbox 360 29.50
B4F00001 Microsoft (X-Box)
B4F-00001 Added on 8/19 Wireless Controller Xbox 360 36.42
B4B00009 Microsoft (X-Box)
B4B-00009 Added on 8/19 Wireless Network Adapter X360 82.59
B4S00001 Microsoft (X-Box)
B4S-00001 Added on 8/19 VGA HD AV Cable X360 29.50
B4U00001 Microsoft (X-Box)
B4U-00001 Added on 8/19 Rechargeable Battery Pack X360 8.98
B4V00004 Microsoft (X-Box)
B4V-00004 Added on 8/19 Component HD AV Cable Xbox 360 29.24
B4W00001 Microsoft (X-Box)
B4W-00001 Added on 8/19 S-Video AV Cable Xbox 360 21.80
B4Y00027 Microsoft (X-Box)
B4Y-00027 Added on 8/19 Play & Charge Kit Xbox 360 14.88
B4C00001 Microsoft (X-Box)
B4C-00001 Added on 8/19 Memory Unit 64MB Xbox 360 29.24
B4Q00002 Microsoft (X-Box)
B4Q-00002 Added on 8/19 20GB Hard Drive Xbox 360 90.29
G8600 Intec
G8600 Added on 8/4 9.2" TFT Screen Xbox 360 162.62
G8601 Intec
G8601 Added on 8/16 8" TFT Screen Xbox 360 140.56
B4L00002 Microsoft (X-Box)
B4L-00002 Added on 8/19 Faceplates Hot Rod Xbox 360 13.08
B4L00004 Microsoft (X-Box)
B4L-00004 Added on 8/19 Faceplates Flames Xbox 360 13.08
B4L00005 Microsoft (X-Box)
B4L-00005 Added on 8/19 Faceplates Silver Xbox 360 13.08
B4D00001 Microsoft (X-Box)
B4D-00001 Added on 8/19 Headset Xbox 360 14.62
W1800001 Microsoft (X-Box)
W18-00001 Added on 8/19 Xbox 360 Live 12-mon Gold Card 38.48
Z0600040 Microsoft (X-Box)
Z06-00040 Added on 8/19 Xbox 360 Live 12-mon Gold Kit 54.12
ZE400002 Microsoft (X-Box)
ZE4-00002 Added on 8/19 Xbox 360 Live 1-mon Gold Card 6.16
ZE400004 Microsoft (X-Box)
ZE4-00004 Added on 8/19 Xbox 360 Live 3-month Gold Card 15.39
BJ200012 Microsoft (X-Box)
BJ2-00012 Added on 8/19 Xbox 360 Live 3 month Gold Kit 30.78
B4O00001 Microsoft (X-Box)
B4O-00001 Added on 8/19 Universal Media Remote X360 22.06
G8609 Intec
G8609 Added on 8/16 2.1 Sound System X360 48.22
G8618 Intec
G8618 Added on 8/16 A/V Selector & Storage X360 29.75
G8645 Intec
G8645 Added on 8/16 Vertical Stand w/ Storage X360 12.31
G8660 Intec
G8660 Added on 8/16 Pro Gamer's Case X360 29.75
G8664 Intec
G8664 Added on 8/16 10-CD Aluminum Case X360 9.49
G8665 Intec
G8665 Added on 8/16 Game Holder X360 8.72
S7100009 Microsoft (X-Box)
S71-00009 Added on 8/19 Perfect Dark Zero X360 42.58
S7100051 Microsoft (X-Box)
S71-00051 Added on 8/19 Perfect Dark Zero Tin Box X360 51.30
S7400023 Microsoft (X-Box)
S74-00023 Added on 8/19 Kameo X360 42.58
U2500009 Microsoft (X-Box)
U25-00009 Added on 8/19 Project Gotham Racing 3 X360 42.58
This also gives a little more credibility that Xbox first party titles will be $49.99 and there will also be a Perfect Dark Zero collector's edition. Interesting also that they're gonna lose a buck and some change on the core system which will undoubtedly be made back on purchasing the necessary accessories to upgrade it to the non-retarded version. Some retailers will probably force bundles on the core systems, unless you're someone like Wal-Mart who can handle the loss.