Back in 2006 I re-recorded an old instrumental of mine with an eye towards how playable it would be in a Guitar Hero-ish game. (I posted it here but I didn't mention the Guitar Hero part, I don't think.)
This past weekend I finally "authored" the song in Rock Band, which is what's in the link above. Hooray!
There won't be anymore anytime soon; this is literally the only song I've ever done at this level of quality (everything else recently is sketchbook entries and 24-hour albums, not to mention the fact that I wouldn't inflict a song with vocals on anybody).