I've found this snippet of a Star Wars Insider article somewhere on the net a few days ago (It's been taken from issue #60, Page 61). I thought I post it here for those who haven't had a chance to read it yet.

Quote
In the meantime, fans are hoping that Lucas will get around to putting out a comprehensive DVD set of all the Star Wars episodes that matches the high quality of The Phantom Menace DVD. But the filmmaker has bad news for film buffs who hope that the classic trilogy DVDs will feature both the Special Edition versions and the original theatrical versions of the movies. Asked if there’s a possibility of including the original versions as alternate tracks, to show the evolution of the films, showcase the state-of-the-art era, and preserve film history, Lucas said simply, "I don’t think so. I think of the film as The Special Edition. I don’t think of it as the early version, any more than I would put early rough cuts on. I could put four or five rough cuts onto the thing and say, ‘This is how it advanced.’ I consider The Special Edition as being the final version at this point. I don’t even worry about the other ones, because it went through a lot of incarnations to get to the final stage."

Edit: Fixed a typo in the thread title.