Hi Boxed
It won't work on a 2313. The 2313's 2kB flash is too small for the code, you'll need at least 5 kB, though we're working on making it smaller now. The new target processor will be the ATMega8L, I doubt that you can go smaller; 4k maybe, but never 2k. It's a pity, the 2313 would be great for it otherwise.
About releasing the source: I'm hesitating a bit with it because it's far from finished and partially poorly documented.
cheers
Bernhard