MKVToolnix

MKVToolnix - http://www.bunkus.org/videotools/mkvtoolnix/index.html
Well, this is kind of a reminder/request, if anyone has ever been working on MKVToolNix, which is an awesome program for handling mkvs and maybe one of the GUI's for mkvextract I'd like it if you could share your work, since I'd really like to portabalize this set of tools.
If not, well, if someone needs a project, try this on for size, otherwise I am going to attempt it in my spare time, because it really is helpful for people who maybe want to extract an mkv to convert it for an ipod using avidemux or make an mkv of course.