Haven't had any luck with Fuppes and transcoding. Everything else is great.
mkv2vob works fine, just wish there was a linux command line option that worked - everyone I've tried turns 5.1 into stereo. I don't know enough and cbf'd learning about the mass options with video/audio transcoding/remuxing to play with it myself.
Annoying since mkv2vob seems to use mencoder etc anyway
Ta for link to old thread BaM, I didn't know there was a file format the ps3 could read that contained ac3.