Maynard took part in the Activision E3 event last night, singing a version of Queen’s Bohemian Rhapsody with Billy Howerdel on guitar. This appears to be in aid of the forthcoming Guitar Hero: Warriors of Rock game out in September 2010. Here’s a video:
According to Wikipedia, The Outsider by A Perfect Circle will be one of the playable tracks.
Update: Here’s a little more info from Rolling Stone:
For Keenan, performing "Bohemian Rhapsody" on Monday was an unexpected chance to revisit a big rock song from his own adolescence. Dressed in a black suit and red tie, he approximated the soaring operatics of Freddie Mercury against the strings and woodwinds of the L.A. Philharmonic, as animated characters from Guitar Hero sang along.
His A Perfect Circle collaborator Billy Howerdel filled in for guitarist Brian May (who was originally set to perform), rising from the floor with an old Vox amp and Gibson Les Paul to ignite the original glam riffs, adding touches of modern guitar texture. As the song faded out, Keenan hugged the guitarist, and then grabbed his ass as they descended into the stage.