The 99 Percent alliance has has open-sourced their authentication code, so you can make some small changes and hook up your own forums, jabber and voice chat servers.
I probably should investigate this further; it looks pretty cool.
Just, wow. (in a good way)
Brian K Ward has created some great imagery here; there’s dozens of poster-size pictures available so there’s bound to be something you’ll love.
source: Flickr