One of the better collaborations of this decade is the collective known as 7 Worlds Collide. Headed by Neil Finn, they're 2002 disc paired Fin with Ed O'Brian, Eddie Vedder, Johnny Marr and others which produced a fantastic live album of each member tackling each others songs. Earlier this year, Neil put the band back together, with mostly the same lineup - one of the biggest substitutions is Jeff Tweedy in place of Vedder - but this time produced a double disc set of all originals. Making the web rounds is the track written by Radiohead's O'Briand and Finn called Bodhisattva Blues, for your listening pleasure, on The Daily Feed.
and here is a nice video of some behind the scenes footage: