Re: The Jelly Bean OTA update has started. Post yours here.
Downloading now, after the entire day trying this is what I did (yes I know it was posted before, but figured a little more encouragement that it works is in order):
-Shut Down the phone.
-Pulled the battery for 5 minutes.
-Put the battery back in and started up like normal.
-Went directly into Settings -> Apps -> All
-Go into "Google Services Framework"
-Cleared Data
-Force Stopped
-Went to About Phone -> System Updates -> Check Now.
-Checked for update (Each time, if you correctly reset the framework, it was showing the date of 12/31/1969 if I remember correctly).
(For 5 times in a row, it said the system was up to date, on the sixth try, JACKPOT) For the first 5 times, I only started over where I cleared the data (i.e. didn't pull the battery again or restart the phone).
So if it's not working for you yet, keep trying, the persistence pays off.