I am not sure how useful or needed this feature was, but its still fairly neat: gravatars in the dashboard. WordPress.com now has gravatars for people in the dashboard, meaning you can see who you are approving and deleting comments from.
Very cool though I wonder how much this will slow down the WordPress dashboard over the long haul. Thankfully, Automattic owns and hosts Gravatar now, so I doubt it will be much of a slowdown. I wonder if this is one of the many features we can expect for WordPress.org users in the future?
Check out the full details on the WordPress.com blog.