I'd like to take a crack at spiffing up the UI a bit for this. Ultimately, it would be cool if it were skinnable, but that would take a lot of extra code.
I think the general layout works pretty well. I'm most interested in button design, window dressing, etc. The iPhone has tossed in some new ways to think about finger controlled UI's.
I might mock something up in PS and see what type of feedback you guys provide.