I love it. Gambit-C Scheme is my favorite also (although MzScheme has lots of great libraries). I have an Android phone - any chance of an Android version? I've seen some links of compiling to Java byte code, and there is a native SDK.

Neat. Could you talk more about Scheme. In retrospect how did it work out? If you could do it over again would you use Scheme or just jump into Objective-C? What were the pros and cons of using Scheme.