Sprint considering Clearwire buyout; Comcast reported involved in talks

Sprint Said in Talks About Clearwire Buyout (Bloomberg)
Confusing article. Its not clear what kind of transaction they are considering or how Comcast would be involved. I had been under the impression that Comcast really didn't want to sink any more money into Clearwire.

A deal for Clearwire could be a wireless tipping point (Gigaom)