Yea I remember now, on the Leonard Maltin interviews he says he might direct one of the prequels but will probably get other people to do the others. I would've been happier to see him out of the director's chair completely and make for a more aesthetically pleasing saga with only episode IV under his direction. Of course, the interview was a couple years before the SE's were released (although they are mentioned in the interview) and that was really the ditch Lucas dug for himself and the OT.

CO, now that you mention it, TPM was arguably the dirt he used to bury it.