PS3 - Hus
Wii - GBallzack
360 - ???
Seriously, no real fanboys for the 360 ever on this level and the new fanboys don't compare to the old lot as far as sheer stupidity goes. If I had to do current fanboys however.
Wii - Girl Gamer Elite (Essentially GBallzack)
PS3 - Diomedes and Crazzy (both extremely optimistic about the PS3 to say the least)
360 - Legend I suppose (Though most of his posts refrain from any outright fanboyism)