The Official Radiohead
News, links, very cool.
Green Plastic
Website dedicated to Radiohead; features news, lyrics, media—you name it.
Radiohead Remix
Radiohead has been releasing tracks from In Rainbows to be remixed by fans. This is the site where you go to participate, listen, and vote on the fan remixes.
Aniboom/Radiohead
Together with Aniboom.com, Radiohead has been holding competitions for fan-made music videos. This stuff is amazing.
"Radiohead Says: Pay What You Want"
An article on Radiohead's widely publicized choice to release In Rainbows online… at a price that was entirely up to whoever downloaded it.