Actually, I misread that - well over a month to wait for it to come out on disc as it's 28th March not Feb; download is out this Saturday.
Rumour has it that one reason for Radiohead carrying on with CD releases as well as download is that Thom Yorke likes the novelty of seeing the band's stuff on sale in his local Sainsbury's! Forget where I read that (either Q or NME) but it was mentioned somewhere when In Rainbows came out in "hard copy" format.
David