The CD is called In Rainbows and will be released on Oct. 10th. You can preorder the album download right now off this
site where they give you the option of how much you're willing to pay for the album. Whether it be nothing or $20 - it doesn't matter. Pretty interesting, just thought I'd post it.
"While the disc box is priced at £40 and includes the digital download, the price when purchasing just the download by itself is set by the buyer (plus a transaction fee of 45 pence). On purchase, the buyer is prompted to type the desired price, with the text "It's up to you" as an explanation."
wiki
digg entry
note: apparently the download only includes CD1 of the 2 disc box-set.