| | Re: 8520 startup stuck.
How long did you leave it to see if it will finish booting. Sometimes, for whatever reason, I've personally seen a BlackBerry take 20 minutes to boot. There's a post somewhere on this board, or maybe the BlackBerry support forums where a BlackBerry was left for hours and it finally finished booting. But I would definitely given it 30 minutes.
If it won't boot, see the article over at Crackberry on recovering a nuked or bricked BlackBerry.