There's someone who built a source module before the official module came out (I think his name is Vladimir?), but both of them integrated with Subversion.
Sorry, I haven't heard of anyone providing GIT support for activeCollab's Source modul. We'll consider development of such integration as core feature, but since we don't use GIT ourselves, it may take a while (there are also some more important task on our to do list at the moment).
Thanks for your reply Ilija. Myself, after working for 2 years with SVN with a group of 5+ programmers, I cannot even think of the idea to work again with SVN. Git is a superior DVCS which turns collaboration into real fun, and very very strong helpful commands. Check it out.
http://www.youtube.com/watch?v=4XpnKHJAok8
Has anybody integrated activeCollab with Git ?