According to WordPress News: WP 3.3 almost ready with Beta 4 available for testing.

The march toward 3.3 continues!

With all our major tickets closed, we are very close to a release candidate. In Beta 4 we’ve fixed a bunch of bugs, cleaned up the UI, added real text in some of the screens that still had placeholder text in Beta 3 (post-update screen, the Dashboard welcome area, new feature pointers), and generally tightened things up. We updated to jQuery 1.7.1 and addressed a LOT of bugs.

If you are a plugin or theme developer (or distributor), please test against Beta 4 to ensure there are no issues.

I am running this beta version on my site. It runs great and few more extra features but a bit buggy. I can't wait for the stable version.