It handles QuickTime, might be depending on the version. I've just uploaded one of the samples using Sorenson on my Mac and the result will convert.

It's running mplayer from Subversion so it should even handle WMV9 using the prototype code.

About a fifth of the YouTube videos I've tested fail, I've no real clue why.

Making the "you're in a queue" message automatically refresh would be an obvious enhancement. I'm also thinking about email notification about when it's ready, what do you think?