I've just downloaded and installed CommunityServer.org 1.1 . There was a simple readme file with a few simple steps and then you hit a web page and a install wizard walks you through the rest which is very impressive.
CommunityServer allows you to have Blogs, Galleries, Forums and will soon have v2.0 out which will start to incorporate a new CMS which the organisation has purchased.
I'm going to be running v1.1 in replace of my current made4the.net web site which will allow me to centralise my Photo Gallery currently in Flickr, Blog currently sitting in blogs.inlinehockey.co.uk instance and my portfolio sitting as static pages on made4the.net.