Today WordPress 2.8 was realeased this new version of the software is dubbed ‘Baker’ in honor of noted trumpeter and vocalist Chet Baker.
I’d wait at least a few days for the dust to settle before installing it on your website. (In case they need to make some fixes to it). There are some really cool new features to make working with WordPress even easier! Like installing themes from inside your dashboard, and working with widgets. Here is a video with the new features
If you want to read more on this new update then go here: http://wordpress.org/development/2009/06/wordpress-28/