Way ahead of you, I'm in New Zealand, I watched it this afternoon. It was pretty good, especially compared to the awful later episodes. Just hasn't got that same edge like back in the mid-90's though. Story was a bit out there, the entire town being encased in a dome, and very little screen time for most of the minor characters, (no Sideshow Bob), but it had a lot of funny moments.
Should have made this film 10 years ago, but still, every Simpsons fan should watch it.