MythTV, the famous DVR for linux, is getting closer to the 0.22 release. Take a look at the subversion list of branches. The new branch is called release-0-22-fixes. If history is any lesson, the official release should follow soon.
The new version comes with a brand new UI and relies on Qt 4. The full list of new features is available in the release notes.
MythTV is available in various versions in Ubuntu: see MythTV. And version 0.22 is already available in Karmic.
