I got interested in writing these small apps, so I started with C++; my next class will be doing C++ for object-oriented programs. After that, it looks like I'll have to go slideways and take an iTunes University course from Stanford, because they're the only ones I know of that actually teach the language used on the iPhone, Objective C.
I notice a few comments on Google's new language, Go. Is that another language that can be used to write these apps, and which is better, and where do people learn them?