I wrote a piano-only arrangement of The Simpsons Theme by Danny Elfman. It's among one of the hardest pieces I've ever tried to play, mainly because of the fast tempo (170 bpm), numerous key changes (Um, six modulations in a 60 second piece), and long sixteenth-note runs... many of them on scales I don't normally play (dreaded whole-scales). Anyway, although I'm still working out the kinks, but I'm looking forward to recording that one.
Interested?