I already have a wiki set up about social networking and blogging software as related to LJ:

http://codex.journal-press.com/

It takes OpenID logins and anyone wanting to use it to write guides, etc, is welcome to. It can also host programs people develop and other tools--I can offer subversion hosting as well.

I have a really extensive evaluation page there:

http://codex.journal-press.com/Evaluating_alternative_services_for_blogging