Originally Posted by spiderx_mm
If you want OTA upgrade, flash an official motoblur SBF first and then do the OTA upgrade. I believe that SBF for ICS ROM will also come out shortly. you can also directly flash it.
Do NOT do this! If you want back on the official updates, use a fruitcake to get back to stock and never update via OTA. You've got an unlocked bootloader, so doing so is just asking for a brick.
It shouldn't take long after the OTA becomes available for a fruitcake to be made from it.