Here's another interesting bit of news that just arrived into the Phoronix inbox this Thanksgiving: it's now possible to do TrueHD, DTS-HD, and E-AC3 over HDMI on Linux via FFmpeg. The TrueHD/DTS-HD/E-AC3 support is added to one of FFmpeg muxers to allow HDMI pass-through for these formats. DTS-HD/DTS-HD MA audio up to this point hasn't been supported under Linux and it's used by a sizable portion of the Blu-ray media currently on the market.
This patch-set against FFmpeg can be found on the project's mailing list
. It's presumable that these patches will make their way into FFmpeg 0.7 and thereby push the Linux Blu-ray support one step further along and an advancement for Linux multimedia support in general.