This gen: XBOX360 : round 48 games and still counting :) and round 70 XBLA games .. i really love them more than "big" games :)
Wii: 7 games
Other gen:
PS2: round 70 games
PS1: round 18 games
PSP: 11 games
Gameboy Advanced: 9 games
Gameboy colour: 18 games
XBOX : 74 games
Dreamcast: 52 games
NDS: 1 :D (well.. didn't have time to buy more right now)
PC: much more than 200 from gog or cheap sellers :)
The more I read the "console flamewars", the more i love my dreamcast :D
Proud owner of: Dreamcast, PSP, PSOne, PS2Slim, Xbox, Xbox360, Nintendo DSLite, GB color, GB Advanced, Nintendo Wii