Different kettle of fish, though, mate.
At Xmas, we took our Wii over to my sister's place where we were all celebrating, eating, drinking, etc... She had a 360 that she'd just bought but nobody was interested in that - everyone wanted to play the Wii instead. It's a much more sociable console than the 360.
Admittedly, the 360 has vastly better graphics, a much better catalogue of games, XBox Live, etc... but when it comes down to it, these are only more important when you're playing alone. It's no fun for other people to sit and watch someone play Gears of War, but if you've got people over, then watching them do the boxing or play tennis in Wii Sports, or do cow tossing in Rayman, etc... is a much better experience, imo.
In an ideal world, the 360 (or PS3)
and a Wii is a perfect combination as you cover both bases
