With the release of Drupal 6 around the horizon, I made a presentation (as part of GHOP) that (attractively) outlines 5 new features in Drupal 6 that I deemed "awesome".
Last year was one of the most exciting years for Drupal. We saw Drupal 5 mature into the powerful engine that it now is, and have spent the last few months anxiously awaiting the release of Drupal 6.