Now it’s offiicial Wordpress 2.8 – baker is released with a whole new exciting features.
Major improvements are:
- Wordpress 2.8 is much faster
- Themes directory with new options like browse, install and preview.
- Redesign of the widgets area. all widgets on the same page.
- new Screen Options on every page.

Some more links are here:

2.8 Release Jazzes Themes and Widgets – From the official Wordpress.org blog

WordPress 2.8 Tips and Tricks Collection From our favorite weblogtoolscollection.com

And we also talked about it a few weeks ago – Exciting New Features In Wordpress 2.8 and also here.