I knew they still had limited compatibility, I just didn't realize it covered so many of the games that it does. The earliest models came with a PS2 chip build into them, which from what I understand, allowed them complete PS2 backwards compatibility. The new models only feature limited backwards compatibility, like the 360 has with Xbox games. Sony has a list of the games that are backwards compatible but it is really short.

As for how do you get a $100 off coupon for anything, it just came in my usual Gamestop Rewards emails. Had a hard time believing it, that is quite a price cut. A few searches on the web seemed to indicate that it was only sent out to Rewards members who had no PS3 game purchases recorded on their accounts.

I actually anticipate that there is a full retail price cut for the PS3s near on the horizon. Either that or Gamestop was just really over stocked on the things and figured they could stand to take a hit on a certain percentage of consoles with the anticipation of recovering it in game sales. It is true, I buy most my games there for the Xbox, and if I decide to keep the PS3, I'll probably buy most my PS3 games there as well.