Pringles
http://www.pringles.com/pages/nin_register.shtml#
Nintendo.com
http://www.nintendo.com/sweepstakes?id=2U6zvrfQ899Rtg6wep4ZqWIfyB1y9hBZ
Ko*taku
http://www.ko*taku.com/gaming/original/ps3-giveaway-the-first--203751.php (remove the * - please don't bannund me mods)
Playstation Underground
http://www.us.playstation.com/EP/Promotions/239/entrypage.html