Saw it, loved it, want to see it again. I thought this was like 98-99 Simpsons level of funny, not quite as good as the early seasons but still great. I will agree that the middle dragged, but I think the same of ROTS and that's a fine film.
My favorite part of the movie was definately the (SPOILER) cameo. That was so damn hilarious! "Ruffle my hair, Mr. (SPOILER)!" Spider Pig and Grand Theft Walrus made me LOL as well.
Can't wait for the DVD.