Try fandango.com - I think they're pre-selling tickets so they should have city listings. But I can't say for sure.
Fer some reason, Fandango said it wasn't playin my town. Thanks for the help though!
Well...I just found the site again where you can enter the town and the list of theatres come up. 2 theaters in my town are playing The Passion of Christ according to the official site. Yippee!