I've been using Nullriver's MediaLink to stream video from Mac to PS3, and it works pretty well. The main problem is that max FF/RW rates are only 1.5X. So if I'm halfway through a movie and accidentally hit stop, it takes a half hour to FF to where it had stopped. The other problem is that MediaLink eats up a lot of bandwidth so the Internet slows on the Mac if a movie is being streamed. What I'd like to do is use a backup drive that has my movie library on it (about 1000 vids) as an external drive for the PS3. I assume the PS3 can read the M4V format because MediaLink streams them without transcoding, but will it be able to read the long movie titles on the drive? Finally, I need to be able to hook the drive back to the Mac if there are new movies to add to it. I'd use Carbon Copy Cloner to make the update. Has anyone used this setup?