"The King of Limbs: live From the Basement" is a live studio performance of Radiohead's recent album. There are also performances of The Daily Mail and Staircase, which haven't been released yet. Supercollider has been added as a bonus track.
Available now from http://www.thekingoflimbs.com - if a digital version is all you require, it will be on iTunes from the 19th December. The DVD & BluRay will be in the shops, but probably not until the end of January.