2.7 is finally live on WordPress.com based blogs. Actually, 2.7 has been running on wordpress.com for awhile, just not the exciting new admin UI, which is now released with immediately available to everyone on WordPress.com. So take a few minutes to explore around, there are a ton of new features for you. Try rearranging your dashboard, or your write page. Click the arrows in the menu to expand modules and navigate faster. Go to your profile and turn on keyboard shortcuts for comment moderation, said Matt
For self-hosted WordPress.org will have to wait for WordPress 2.7 until next week.