This was actually a pretty revealing interview with Lucas, if you read between the lines.
Lucas describing how Vader finds out Luke is his son from the emperor is pure Special Edition retconnning. He references the new dialog by Ian McDiarmid where the emperor explains to Vader about Luke. In the non SE version, the emperor simply states that their new enemy is Luke, and Vader very quickly responds "hes just a boy" meaning, hes known about Luke and who he is pre-empire.
I guess I was surprised that Lucas would reference the new scene as if it had been there since 1980.
Lucas' daughter writing for the Clone Wars shows who will be keeping the franchise going when hes gone. Sadly, the daughter is writing an episode about Darth Maul having a brother, which even I as a prequels fan think is rubbish.
Lucas' statement about being "out of work" in the late 80s-90s is interesting. Any interview with Lucas from 83-97 always had the "where are the prequels" question. Surely he knew if he just made a few more star wars films or had another director do them the money would be coming in. He did farm out the ewok adventures but he must have had an idea of what everyone really wanted.
Which leads me to the conclusion I've had for awhile. Lucas dislikes the original trilogy, or tolerates it. Lucas never got to make the films he wanted to make, he made very compromised versions of them, with Jedi being the least compromised, which is why the prequels all feel like follow ups to Jedi, seriousness with silly kid humor and creatures. Finally with digital technology he made the prequels which is his real vision of what Star Wars for him is. Thats why hes involved with the writing for Clone Wars also, he actually cares for it. He never cared about the post ep. 6 stories because it never interested him creatively or with what he could do with it.
And all this lying about Vader always being Luke's father (guess Lucas didn't hear about the Leigh Bracket script leak), the retconning, the special editions. Its all to make it shoehorn into the prequels which is what he always wanted Star Wars to be. Big armies, lots of jedis, yoda with a saber etc.
Even his story that he began with ep. 4 because it was the most interesting is a lie of sorts, since he had to cut down his original treatment to fit budgetary concerns, not creative. I guess from a business point of view he can't tell the truth about what he feels about the OT, but its definitely there. And why we will never see beautifully restored non SE versions. On the prequel dvds, theres always alot of deleted footage, yet none for the OT. Most likely he considers them so bad, in his own head, that he would never want them out there. But now he has too, because with BluRay there would be no reason to hold back that stuff now.
Long ranting post here sorry, but it was a good interview I think.