Wii:
Pros: holyroflbbqlol Brawl, free online, a solid flow of good games, Virtual Console
Cons: Weak graphics means it loses games to the other two, mainly every racing game and shooter, Wii Point Cards not coming in 1000 Point doses yet, low online list
360:
Pros: Is got Rock Band, good online, good list of games, the controller
Cons: Paying for Live, messing with modem for Live, disk tray, the power brick, no reset button
PS3:
Pros: Looks nice, some good games, GoWIII
Cons: Fleeping expensive, huge, library that doesn't justify the price