Tamarin itself is a beast of a system. It is a huge jungle of C/C++, ActionScript, Forth, and assembly. Even the idea of forth is very interesting since the language itself simply expresses a stack based machine, meaning when you code, you need a stack executing in your head. My brain isn't quite at the point where a stack executes as fast as regular code.
So far my understanding of how these languages interact is fairly limited, and I'll be jotting down my adventures into the Tamarin source as I reach them.