We reported this to you last September but thought that you would want to read it again from the L.A. Times:
Radiohead and Sigur Ros are planning to merge their ambitious musical aesthetics to collaborate on a score for a new piece by the Merce Cunningham Dance Company scheduled to premiere in October at the Brooklyn Academy of Music. Meanwhile, a DVD of videos done for Sigur Ros’ music, including the short film “Untitled #1,” directed by Floria Sigismondi and premiered at the recent Sundance Film Festival, will be released in the spring.
As far as we know, this still hasn’t been confirmed yet.