Really what I'm after right now is just a quick hack to get the Arduino stuff loading to and running on the Butterfly, regardless of what libraries end up working. I'm so fed up with the usual open source tool chains and libraries that I just want the simplicity of Arduino. I want to write programs, not infrastructure.
Since the fanciest controller I've got beside the butterfly is a 2313, if I'm going to do it its going to be the butterfly.
At the moment I'm not sure what to do about getting the Arduino IDE talking to the butterfly. avrdude reports an error 'not in sync: resp=03f'. Guess I'll have to chase that down today.