I can't wait... I've been waiting for a Simpsons movie since they first broke free of the grasp of the Tracy Ulman show.
As I've said before here's the cultural difference in animation between the US and Japan.... in Japan, a cartoon that is around maybe 5 years is guaranteed at least 2 or 3 films... some shows that have been around a while and are really popular get a new movie every year (Doraemon especially). Here, we're lucky to have a cartoon even get made into a theatrical production. By the Japanese model, we would have had at least 10 Simpsons films by now! Of course, their films are usually 45 minutes long, and in double features with another show.
I REALLY hope they don't screw it up like they've screwed up the last few seasons, but I still will be there opening day... or at least, the first few days.