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.