This is really tragic. I rely on VLC for all my video viewing needs. It loads video much faster than QuickTime w/ Perian and is much more responsive, not to mention the vast array of file formats it supports. I also like being able to tweak the buffer sizes to optimize playback from my NAS. I'm a little shocked there aren't any Cocoa devs wanting to work on this. Do I need to try and learn Objective-C now? I fear I would only damage the code base.
One thing that VLC Mac developers really want is testers! There is too few testers. This a job that can be done by any guy who want to try a new software. That's not an easy job but that's a valuable one!
mplayer is great and I use it as my primary video player, but I can understand why one would prefer VLC -- it's much more friendly, even if you use the GUI for both.
Also, mplayer and VLC are helpmeets in my system; sometimes VLC can play something that mplayer will choke on, and vice versa. VLC is a valuable resource indeed.