I finally got a copy of Lego Rock Band, and was really pleased to discover "Short and Sweet" by Spinal Tap fulfilled some of my Frank Zappa cravings.
It really reminded me of Zappa when I first listened to it; so I looked it up and discovered it features Steve Vai on guitar, who has worked a lot with Zappa.
Check it out if you haven't played it! LRB is a fun play through as well.
Yeah, I know, old news, but new to me.