no
You can trade in a Wii at Gamestop, but you can not get a PS3 for it without cash
you can add points with a credit card in your playstation store or you can buy points at any shop that sells video games (i.e. Gamestop, Walmart, Target)
Gamestop will most likely replace your PS3, If you Warranty if it is still "Valid"
Gamestop,Walmart
gamestop
online or at gamestop
Yes at gamestop
Why would anyone want to trade a working PS3 for a PS2. A new PS3 costs much more than a PS2, but a used PS3 traded in might now get enough trade in credit for a new PS2 at Gamestop. On October 15 2011 many Gamestop's do not have an inventory of new PS2s so it would also depend which Gamestop you went to.
no
yes. Gamestop has it for $20.00.
Try calling Sony or check your local Gaming store such as GameStop or an electronics store and see if they can help.
They will give you something (very Little) off the purchase of a PS3