There's been some horrible rumors flitting about that the PS3 won't play used games. This is patently false and a terrible misrepresentation of the PS3's healing powers. While it will be spensive, it will not have signed games or any such nonsense and you will be able to share your games with your weird cousin when Mom goes over to visit your equally weird aunt.
According to arstechnica, this story surfaced when Japanese game publishers tried to outlaw the sale of used software. However, this is not true and the PS3 is hurt by the accusation.
Sony emphatically denies rumor that PS3 will not play secondhand games [ArsTechnica]