Kantor on 31 October 2009
Well, I'm not sure about specifics, but these are the two most popular (not counting PS3TrophyCard)
www.playfire.com (make an account)
www.eu.playstation.com (it doesn't matter if you're European, sign in with your PSN account. Only annoying thing, you have to sign in, click "My Trophycard" and click "update". Annoying)
(Former) Lead Moderator and (Eternal) VGC Detective 
