Not for lack of trying, says Sir Paul. He says that he's down with it, and that both sides are still trying to come to an agreement, but that "we" (presuming that means the band themselves) definitely "want it to happen." But he also says that "the record company" (presumably Apple Records, who have had their troubles with Apple Computers in the past)
"was taken over by new people quite recently, so there is a gridlock of sorts." So we continue to wait for The Beatles to show up on iTunes.
Meanwhile, they are apparently going ahead with the Rock Band version featuring The Beatles -- McCartney says that Harmonix is still planning to put the music in the console videogame/band simulator, and that they're going to feature The Beatles in different eras: "early days, Liverpool, then psychedelic, and on from there. It's very cool." Sounds like it -- even if we can't play the White Album from AppleTV, at least we'll be able to do it from the Xbox.