Radiohead ditches iTunes to keep album complete – The Unofficial Apple Weblog (TUAW):
The album isn’t some sort of artistic medium that must be upheld. It’s a marketing/production vehicle, created by the record industry. Nothing but a collection of songs.
Also, the headline is wrong, as Radiohead never have used iTunes, due to their aversion over having their work broken up. Controlling the listener experience seems like a waste of time, but it’s their time to waste. And as someone else on that thread pointed out, Thom Yorke’s The Eraser is available as tracks.