Actually, according to GameSpot, the XBox has 1162 games.
But the PS2 has 2687. :-)
Not that it really matters, because there's no way any of us would have time to play 1/10 of those.
I'm not really interested in which one is "better" than the other, either. The PS2 has some very nice looking stuff. Considering that we have a first generation projection TV, it's not going to matter much regardless...
I wouldn't exactly call Twilight Princess a "twitch" game, either. At any rate, what makes the Wii such a great platform is the controller.
And no, I don't see much point to modding it.