Hi,
first of all, thank You for this great movie catalog. The only thing I really miss now is matroska support. In future versions could be also added support for reading matroska tags.
Btw. What are you currently working on, if you are? If you don't have enough time to work on the Movie Catalog, I understand it. There is never enough time :-( Have you ever thought about adding your project to sourceforge.net? Maybe somebody would join it and would help you with the development.
Vlada
Matroska support
RMFF
I just tried Ant Movie Manager today, and I am looking forward to import support for Matroska. It would be great if RMFF import support was added too 
http://www.bunkus.org/videotools/librmff/
After Matroska support is added, there is always the option to batch convert everything to MKV and then import though..

http://www.bunkus.org/videotools/librmff/
After Matroska support is added, there is always the option to batch convert everything to MKV and then import though..