Matroska had a Stereo flag for a long time. Stereo 3D has always been an early goal for Matroska but we lacked the use and devices/real life examples to test.
With the rise of Media Centers and even programs to manage large amounts of audio files, it's becoming necessary to visualize your files easily, not just browse by names.
There is a lot going on in the Matroska world. Visible and not visible things. For example libebml2 (a pure C and BSD version of libebml) can now handle CRC-32 on read and write operations.
A brief but important message to let everyone know that we moved back the #matroska IRC channel to the FreeNode network.
As I am writing this, the GUADEC is taking place in Paris.