Yes, I think Amos would we awesome. Mr. Cellophane is one of the best songs in the show (my opinion doesn't hold much weight though, since it might be totally different in the stage version. :) ).
What other parts...not Fiyero in Wicked, just because I think the part is poorly written, and beneath Adam. :) (In Norbert's defense, he could've done better too.) On a totally different topic, aside from Elphie and Galinda, the other supporting characters are kinda crappily written in that show, eh?
Even though he said once that he doesn't like this show, I think he'd have an awesome voice for either Jesus or Judas in JCS.
"It's not always about you!!!" (But if you think I'm referring to you anyway, then I probably am.)
"Good luck returning my ass!" - Wilhemina Slater
"This is my breakfast, lunch and f***ing dinner right here. I'm not even f***in' joking." - Colin Farrell