After a few delays, WordPress 2.7 has finally been released. It contains a completely new Admin interface, which allows you to get to the page you want much quicker and easier. The Admin interface is now much more customizable now, allowing you to rearrange Dashboard widgets and show and hide specific boxes on the Write screens.
2.7 also has tons of new features, including a threaded comments API for themes to use, the ability to reply to comments right from the admin. It also includes support for automatically updating itself, whenever a version after 2.7 is released (so no more FTPing to update WordPress after 2.7)
The WordPress guys have created a video showcasing the new features, which you can see over on their blog.
It it recommended that anybody running an older version of WordPress to update as soon as possible.