This morning at the TCA convention in Los Angeles, CBS President Nina Tassler confirmed that the network is indeed "pretty close to closing our deal" with singer John Mayer for a new musical/sketch/variety show. Looks like NBC and Rosie Live! didn't kill the genre after all.
As of now, Tassler said, there will just be a pilot -- which could lead either to a further series of specials, or to a regular series. "We're just going to shoot the pilot now, see what we have, and make a decision after that," confirmed the network prez.