Check out movie times with this nicely designed app for the iPhone. Just enter your ZIP code and the date, and goMovies will let you sort by theater or by current movies. Though you can't buy tickets in advance, discovering when and where movies are playing by using your phone is definitely useful.
iPhone link: http://webologistdesign.com/gomovies/demo/index.php
Web site link: http://webologistdesign.com/gomovies/