I don't think there is offline documentation, apart from a German book on SS that I think is currently being translated into English. This is a young project, and most of the documentation is online in the form of a Wiki. You could print off particular pages, or use this Firefox plugin to save pages for looking at later: https://addons.mozilla.org/en-US/firefox/addon/427
As to your "community" site, what exactly do you mean? What functionality?
Maybe you're already on your way. It'd be intersting to hear.