I've been searching everywhere for help with this issue and haven't found anything exactly like my problem. I updated to rooted Froyo about a month ago, because.. well, why not.
So I finally got the message that an update was available for my phone on Friday (2.2). Tried to run the update, sprecovery blocked it. So I decided maybe its a good idea to unroot and do a factory reset, then reupdate my phone to 2.2, since it was starting to boot very slowly and even some of the apps would just crash for no reason. So did a backup, then did a factory reset, went to activate my phone by going through the mini setup wizard, "ACTIVATION SUCCESSFUL", sweet.. wait 15 minutes... nothing, no Activation what so ever, no 3g, no internet, nothing. Well crap, so I downloaded the 2.2 and tried to reflash, E:Error 7, or something of that nature. So now im in big trouble, I then did a restore to my saved 2.2, which worked, and brought me back to 2.2 rooted, but I still can't register, ran the *228, it says registration successful, but doesn't program/register after the 15 minute grace period, tried doing the manual user activation via ##7762726, and it tells me "feature update could not be completed." Any help would be greatly appreciated!!!