Say hello to Mr. Common Sense!
If it isnt ported to win2k/xp, then Mr. Common Sense tells you that obviously there is no source available, as it would be ported to it by now, especially since it is currently being developed on linux, which due to its open platform, makes it extremely bloody easy to port to other OSes/Platforms.
A quick visit to the website would have revealed this. Can you not navigate yuor intarweb navigator application? Oh, of course you can, you must just be lazy and stupid.
(Note that im just kinda pissed off at something else right now and felt like flaming someone. Dont take it personally, I think those retards should open up the source too... Ahh, that felt better.)