Blender 3D 2.60a was released on Oct 24, 2011. The 2.60a release is a bugfix release for 2.60 shown in the changelog. The changelog/release notes for 2.60 show all of the great new features that were added.
Features of 2.60 release:
The Blender Foundation and online developer community is proud to present Blender 2.60. This is the beginning of the Blender 2.6x series, targeted at including all work that happened in branches or patches past years.
Most notable in this release is 3D audio, UI translation, improved weight painting and a lot of animation system updates. Check the list  for highlights and the full changelog.
Keep up the great work guys! Looking forward to 2.61 near Dec 2011 which will include the Cycles render engine. The Cycles render engine is merged in the trunk so any recent trunk build will include this. It will be the greatest thing to happen to the render engine in a long time. Get a fresh copy at graphical.org if you want to test Cycles out.