Users of MythTV, the most popular linux-based HTPC software (open source and free of course) now have their 0.24 release after a six-month wait!
This latest version (0.24) of the open source HTPC software includes several updates and new features including a new on screen display, all new HD audio support, Blu-ray support and many other features and fixes.
Get the details on the 0.24 release with a full changelog at the MythTV page