Hey, I was just thinking that it would be cool to be able to program the Arduino in lisp. You say "a subset" is supported, what exactly does that mean? I assume I can't get a REPL on the Arduino (though that would be awesome), but I hope macros and lambdas work. (After all, wouldn't be much of a lisp if you can't write macros... :P)
However, I must echo the need for a bit of documentiation. I'd like to give this a try, but I'm not sure your little hint below is enough to get me going.