The WordPress Developement have released beta 2 of WordPress 2.7 with a long list of updates and bug fixes.
I’m not going to test it on my server because I don’t think there’s a huge amount of updates from a visual perspective.
Anyhow, if you want to see what’s been done, head over to http://wordpress.org/development/2008/11/wordpress-27-beta-2/
You can also grab a copy there or from your Admin itself.
Don’t forget the final release is due on the 10th 
Enjoy!