How about a Guitar Hero controller <cough>FUCK YOU, ACTIVISION!
</cough> made of out a real Peavey guitar?
$399 gets you one for the PS2 with models available for nextgen platforms this fall. You can pick one of twenty skins / designs themed on Kiss, Megadeth, Ozzy, Lynyrd Skynyrd, or Pantera.... or you can create your own.
If it works with both Rock Band and Guitar Hero... I'm fucking there.