Right now, I've got a PS2, a DS, a Wii and a 360. Theoretically, I still have an Atari 2600, a SNES, a GameGear and a 64 somewhere, but whether they still work is another matter.
I might buy a PS3 eventually, once Sony drop the price, and once we start actually seeing some worthwhile games released for it. As it stands, there's pretty much nothing coming out for it this year that I'm even vaguely interested in.