http://getvanilla.com/ http://lussumo.com/community/ Comparing their approach to Drupal's we do not fare bad at all. Some tiny details I like (to rip from them ;): Not logged in: * Overall look. yes, perhaps too Typepad but nice and smooth netherless (perhaps even too low-contrast, I have missed many vital UI elements) * "edited" mark next to a comment * Informative login / register dialogs Logged in: http://lussumo.com/community/signin.php guest:guest * switchable small / big textarea (but ihmo it should work vice versa, small -> big) * ajax-based (un)bookmarking * ajax-based (un)blocking topics (taxonomy) * navigation history block * search history block