Camtasia Studio 6 has been released and boasts the following new features over version 5:

1. H.264 format HD-quality video for the web.  H.264 is an industry leading format with small file sizes.
2. New production presets including Youtube, HD and Screencast.com) that can use the HD format for output.
3. Audio and video tracks can now be edited separately.
4. 7 Customizable hotkeys.
5. You can now edit .mov files in Camtasia Studio.
6. 3dTilt Effect on your videos.
7. Better precision (1/10th of a second) with timing of callout fades and transitions.
8. Free Screencast.com account with 2GB storage and 2GB bandwidth per month.
9. New recorder.  Not just an upgrade, but completely new.

And when it is recording, it looks like this:

You can view a complete list of changes on the TechSmith Website.