(Telligent) Community Server walk-through
Very nice walkthrough video about Community Server (of Telligent – presented by its president, Rob Howard, formerly an MS employee for several years)
http://videos.communityserver.org/Walkthrough/Walkthrough.html
It’s a very cool collaboration/portal server, with friendly WYSIWYG (what you see is what you get) tools for admins and users, using ASP.net. Personal edition is free. Here are some links about it:
http://communityserver.org/i/overview.aspx
http://communityserver.org/i/scenarios.aspx
http://communityserver.org/i/licensematrix.aspx
https://store.telligent.com/FamilyProducts.aspx?id=1
Also at http://www.communityserver.com/ they have hosted version, where you host a community server at their own machines
An interesting blog on CS is at http://gcapnias.spaces.live.com/ (by a CS and MS MVP)