Terrible news from Slashdot that the swiss army knife of video encoding and decoding, VLC, currently has no developers whatsoever working on the Mac OS X version of the project. As the forum post to which Slashdot links mentions, the learning curve for VLC is considerable so even if developers were to step up now, there would be some time before they could have an effect in restarting releases for the Mac.
Help spread the word, if you know any developers savvy with the OS X tool chain with experience in audio and video, talk to them about the possibility of helping out. Otherwise, Mac users will lose a major escape hatch from the proprietary media ecosystem dominated by Quicktime.
Update: The VLC folks have provided an information page that should be kinder to their servers.