Have they confirmed that once you put the game in your machine it will only play in that machine thing yet? So pretty much you can only buy new games. I remember that being a rumor a couple of months ago, but I highly doubt that would be true seeing as it would affect sales significantly. With the 360 getting some more good games in the near future and the release of the Wii in a little more than a month, I am not sure how good the PS3 will do.
A good idea for money, buy a PS3, dont use it then just sell it on ebay shortly after it is released, you would make so much money.
You can find info here,
http://boards.gamefaqs.com/gfaqs/gentopic.php?board=927750 .