Considering the lack of the main antagonist from the previous six films, I don't really know how well a full on Sequel Trilogy would work out. As long as Lucas were still directing it, of course, I wouldn't mind-- I just don't figure what it would be. Without Palpatine as the main villainous figure in some form or another (mentioned in ANH as the Emperor, cameo'ed in ESB via-hologram, present throughout ROTJ and the PT), you lose the sense of continuity that strings the previous six films together. So what exactly would a ST be about, anyway? Luke Skywalker going on the Jedi equivalent of a Carlos Castaneda journey, a vision quest through the Force, getting high off of midichlorian-mushrooms? A "Star Wars" version of "Altered States"? I don't think there's really enough potential for an entire trilogy that hasn't already been explored and exhausted by the EU. Maybe there's some space for a couple of last SW movies-- maybe a prologue, showing us the downfall of the Sith (and don't gimme that crap about the "Knights of the Old Republic" games), and an epilogue about... well... something. At any rate, if Lucas ever did decide to make 7-8-9, I think it'd probably be motivated more by a desire to play with 3D technology than anything else. And again, I'd be okay with him doing a third trilogy, just as long as he doesn't bow to fanboy pressure and hand them off to another director.