[Quantum Windows Phone 7 Development] bobzero:
Here's a collection of the OEM CAB updates for the Quantum captured via wireshark.

CAB updates can be pushed to your phone via cabsender:

http://xdaforums.com/showthread.php?t=1248799

Instructions on how to capture OEM updates:

Startup WireShark and monitor you internet connection in promiscuous mode. Enter filter: "http.request" (without the double quotes). Start to update your phone. You'll see all the webrequests it makes. You'll also see which cab-files will be downloaded for your language packs.

If you capture a new update, please feel free to post the link here and I will update accordingly.

LG C900

AT&T USA

Mango Drivers - 1.1.6.10 (July 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/07/398423_lg_c900_att_us_1.1.6.10.pks_75c0157f6913f0d58c86948e75cdee54c902bdf3.cab

LG C900B

BELL MOBILITY CANADA

Mango Drivers - 1.0.8.10 (August 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/08/404437_lg-c900b-bel_ca-1.0.6.10-1.0.8.10.pks_76e8c8d16d3dd7edced6edc54ca3af32d392bb13.cab

BELL WIRELESS ALLIANCE (Sasktel)

Mango Drivers - 1.0.12.10 (August 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/08/404440_lg-c900b_sas-ca_1.0.10.10-1.0.12.10.pks_e1c3fc9a8742526abbda9f90a5091faefc46cd73.cab

LG C900K

TELSTRA AUSTRALIA

Pre-Mango Drivers - 1.0.3.10 (March 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/277837_lg-c900k_telstra_australia_1.0.3.10.pks_8e3ed40d6d05dd14eb6093719c438015bbaed4ab.cab

Mango Drivers - 1.0.4.10 (August 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/08/407132_lg-c900k_telstra_australia_1.0.4.10.pks_fc3cabb639ca7155c11bd5cfe4d2981e7b2a82a5.cab

WIFI Tethering Drivers - 1.0.5.10 (December 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/12/437223_lg-c900k_telstra_australia_1.0.5.10.pks_1e2a877b551d2497396bf1d07bf19c833d78381a.cab

TELECOM NEW ZEALAND

Mango Drivers - 1.0.2.10 (August 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/08/408841_lg-c900k_telecomnz_newzealand_1.0.2.10.pks_c01c2a54e1dc9743d62ef5b7943524690d0b909b.cab

Post-Mango Drivers 1.0.3.10 (October 2011)

http://download.windowsupdate.com/msdownload/update/software/dflt/2011/10/412129_lg-c900k_telecomnz_newzealand_1.0.3.10.pks_be97cba8476b2201602512e5180515f0a445013a.cab

Also, here is a way to capture OEM updates for other providers without having to flash a different ROM - change these registry keys (STRING not DWORD):

AT&T

[HKLM\System\Platform\DeviceTargetingInfo\]
MobileOperator = ATT-US
MOName = AT&T Wireless
OEMDeviceName = PACIFIC_ATT_US

BELL

[HKLM\System\Platform\DeviceTargetingInfo\]
MobileOperator = BEL-CA
MOName = BELL
OEMDeviceName = PACIFIC_BEL_CA

BELL WIRELESS ALLIANCE (Sasktel)

[HKLM\System\Platform\DeviceTargetingInfo\]
MobileOperator = SAT-CA
MOName = SASKTEL
OEMDeviceName = PACIFIC_SAS_CA

TELSTRA AUSTRALIA

[HKLM\System\Platform\DeviceTargetingInfo\]
MobileOperator = STR-AU
MOName = Telstra
OEMDeviceName = PACIFIC_TEL_AU

TELECOM NEW ZEALAND

[HKLM\System\Platform\DeviceTargetingInfo\]
MobileOperator = TEL-NZ
MOName = Telecom New Zealand
OEMDeviceName = PACIFIC_TNZ_NZ

Other keys that can be adjusted and have an impact:

FirmwareRevision
RadioSoftwareRevision
MODeviceName
OemName

Thank you to heatcliff for the info: http://xdaforums.com/showthread.php?t=1306415

Just for the heck of it, here is list of other MobileOperator values

000-33
000-88
SMC-HK
ONE-GH
ROG-CA
VOC-MZ
SFR-FR
ORG-GB
ORG-FR
SWI-CH
FON-CL
FON-GT
LUS-CA
SIN-AU
SIN-SG
TMO-DE
TMO-HR
TMO-CZ
TMO-HU
TMO-MK
TMO-NL
TMO-SK
TMO-GB
TMO-US
ORG
VOD-NL
STR-AU
TMO
TLC-MX
ATT-US
VOD-AL
VOD-AU
ROG-CA
VOD-CZ
VOD-EG
VOD-FO
VOD-FJ
VOD-DE
VOD-GR
VOD-HU
VOD-IN
VOD-IE
VOD-IT
VOD-MT
FON-ES
VOD-NZ
VOD-PT
VOD-ZA
VOD-ES
VOD-GB
VOC-LS
VFQ-QA
VOD-IS
VOD
VOD-CD

In case you haven't developer unlocked your phone then follow these steps:

Enable the MFG application:

Go to dialer and enter ##634# then pressing call.
Launch the MFG application, then enter 277634#*# as password.

Developer unlock (DWORD):

HKEY_LOCAL_MACHINE\Comm\Security\LVMod
DeveloperUnlockState = 1

HKEY_LOCAL_MACHINE\Software\Microsoft\DeviceReg
PortalUrlProd = 0
PortalUrlInt = 0

According to this post, these are the only values you need to change to trigger an update from a different carrier/model:

http://xdaforums.com/showpost.php?p=21160598&postcount=1