WordPress 3.3 is scheduled to be released on November 29th, 2011. But for now, you can try out the beta. The new features and updates introduced include:
The admin panel adjusts according to your window size and the widgets can be resized as well.
The new admin bar is more responsive. It features dropdown menus and has been rearranged. Until now, the admin bar could be disabled. This cannot be done anymore.
Previously flyout menus would appear ifthe menu was collapsed, but now the full menu also has flyout menus.
Starting with WordPress 3.3, post name has been added as a permalink option.
Whenever WordPress gets an update, tooltips will now notify users of the updates.
The media uploader now has drag and drop functionality. The uploader now supports HTML5 and Silverlight.