I have to say, great idea, BUT I think that what we should move towards maybe is (depending on if the people at Greenfoot think it is a good idea, since they do the work) see if we can ask for a "collaboration groups" section of the website. I think it would be great if this group could stay local to the Greenfoot community (which I'm sure it will, but just as foresight if others start doing this). By the way, I'd be glad to join and help out with some stuff, especially if you guys need graphic/audio media (that's kind of my specialty :D!). Though I can't really make any formal decisions right now, since I'm fairly busy, and still learning.