I was having the problem when the check for update kept saying try again later and then it would spin for ever. Then I tried booting into safe mode (by holding down the menu button on boot) and the OTA update worked.
I hope this helps anybody who is having issues.
You are the schiznit :icon_ rocker:...and a bag of chips! :rockon:
Does not receive auto push, but I requested a pull and imediately I had a ready to download screen. I was instant, no searching, waiting or try again later.
Download via 3g = 5 min
Install = 5 min
Reboot, setup and configuration = 5 min
Moto ver 2.3.1 / Android ver 2.2 dancedroid