Check out the PowerPoint presentation for a review of Drupal modules for CiviCRM http://wiki.civicrm.org/confluence/download/attachments/33129543/Drupal+Modules+for+CiviCRM+Drupal+Camp+Toronto+2010.ppt?version=1&modificationDate=1288060322608.
I covered the ones in the tarball as well the ones on drupal.org that have stable releases for Drupal 6 and reasonable usage figures. A video of the presentation was recorded along with the rest of the main sessions at the conference. When they are processed and it is put up somewhere I'll update this post with the link.
As background, Drupal Camp Toronto 2010 was a successful two day Drupal camp with over 250 attendees (last one had less than 160) and over 15 sponsors. Keynote speakers included Dries Buytaert from Acquia, Jeff Eaton from Lullabot and Mark Brown from Microsoft.
My submission for a session looking at Drupal modules for CiviCRM won enough votes to get scheduled in the bigger of two rooms. Given the high number of developers and Drupal users with no experience with CiviCRM, the presentation devotes more time to an overview of CiviCRM than a CiviCRM crowd would need.