I've tried encoding some movies (DV streams from iMovie) in QuickTime in the latest builds of Tiger (the ones officially released to developers), and I haven't been successful. It takes an unearthly amount of time to encode on my Dual 2 (3+ hours on a ten minute movie on average). It usually encodes the sound and one frame of the movie (the rest is black), or every other frame. As soon as I can get one that works, I'll post it. In the mean time, do a search on Google, and you'll pull up some examples.
-Chase