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.
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And, as anticipated, MythTV 0.22 RC1 was released on 10/15: MythTV package.