Andrew Nacin who is one of the core developers of WordPress gave a presentation at the most recent meetup in New York City covering WordPress 3.3. The video is 35 minutes in length with Andrew going in-depth on many of the features that 3.3 will have such as the admin bar, drag and drop media uploading, post names for permalinks and more. The video is best viewed at full screen. Thanks to Steve Bruner for the hat tip.
Andrew Nacin Previews WordPress 3.3 At WordPressNYC Meetup