Ryan Boren who is the WordPress Lead Developer has announced the release of WordPress 3.3 Beta 1. According to him,

As always, this is software still in development and we don’t recommend that you run it on a production site.

WordPress 3.3 Beta 1

Here are some significant updates in the WordPress 3.3 Beta 1,

New Media Uploader

There is a new Plupload Media Uploader.

Plupload Media Uploader

Improved Admin Bar

WordPress 3.3 Beta 1 has beautiful revamped Admin Bar.

Improved Admin Bar

New Fly Out Admin Menus

I love this feature. It has enhanced the power and useability of WordPress Admin Panel. WordPress 3.3 has beautiful Fly out Admin Menus.

Fly Out Admin Menus

According to Boren,

Theme and plugin authors, if you haven’t been following the 3.3 development cycle, please start now so that you can update your themes and plugins to be compatible with the newest version of WordPress.

Download 3.3 Beta 1

Test it now – have fun!