Forrester Research published their Q2 2006 Forrester Wave report. Community Server was one of the blogging platforms evaluated.
We’re a relatively young contender to the space, but our initial participation in an analyst process seems to have gone well, “Telligent Provides A Strong, Community-Based Blogging Platform”.
We gave this some more coverage over at communityserver.org, but I thought I’d mention it here because out of the 9 platforms evaluated (Movable Type, WordPress, Drupal, etc.) Community Server was the only offering built on .NET.