We discussed this earlier. I have initiated a Google group for this purpose, and I need people's private email accounts so as to be able to invite them to join.
I am somewhat at a loss, however, as to the precise method we should use for organizing our material. Google groups allows for (1) "pages" which could be html but could also be, for instance, pgn files; (2) discussion threads (and a discussion thread is automatically opened for every page); and (3) file upload and download. However, unless I misunderstand something, no version control system such as CVS is supplied to manage uploaded files.
In some ways I am still thinking that CVS may be a better modality for this project than Google groups. Even so, message me with your private email addresses (I will also share mine with you) and we can get started on Google groups, even though we may want later to switch to some other mechanism.
One possible approach to Google groups would be to use the "pages" for pgn files. There would be no version control, but we could appoint different people to primary editorial responsibility for given pages. We could then use the discussion section to submit and discuss new material. Just how to divide material between pgn files would be an issue for discussion.
Ah, just now I noticed this:
http://www.oss-watch.ac.uk/resources/googlecode.xml . It appears to supply version control, so maybe we can have our cake and eat it too.