Next Gen has an
interview with Blizzard COO Paul Sams about why we won't be seeing
World of Warcraft for the Xbox 360 anytime soon. The main reason is that Xbox Live is its own secure environment and people playing the game on the 360 would not be able to interact with those playing the game on the PC without jumping through some major technical hurdles. There's also the whole "translating keyboard/mouse controls to the console thing" which also represents some issues.