Most of my friends in the real world aren't avid videogamers, or at least we don't talk about videogames much. So here's what I know:
One has a PS2 and just bought a Gamecube for Twilight Princess last fall, he's saving up for a Wii later this year.
One has a PS2, which she uses mostly for Karaoke Revolution at parties.
One uses her PC, strictly to play Sega's Typing of the Dead.
One family has had a PS2 since launch and just bought a Wii for their son's birthday a few weeks back.
So that's:
1 Wii
0 XBox 360
0 PS3
3 PS2s
1 GCN
1 PC