I’ve just finished upgrading to WordPress 2.5 - a very smooth and easy upgrade, thanks to SVN

The entire dashboard has been redesigned and is far easier to navigate, looks nicer, and is much less buggy or “quirky” than before. Ozh’s drop-down menu plugin is a nice addition to it though.

There are some pretty screenshots on the 2.5 Sneak Peak post on the official WordPress blog.