Is it possible to program the TinyDuino with either Clojure or Forth?

It's not something we directly support, but there are projects to bring both languages to the Arduino environment. I believe the AmForth project is actually pretty usable on the ATmega328P, while any Clojure support would be running on a PC connected to the Arduino(TinyDuino) board- not too familiar with Clojure.

Thanks,
Ben