Geocaching has shown up in many Hollywood movies.  Some movies are based around Geocaching, or have Geocaching scenes.

 
There are some listed on the Geocaching.com forums.  The list below is what they came up with.  I have linked each title with a page on IMDB and movies pages (if found). 
There is a ton of discussion.  Read it all here:  http://forums.groundspeak.com/GC/index.php?showtopic=242811

G.P.S. The Movie	IMDB	Official Movie Website
Tracker	IMDB	Official Movie Website
Are You Scared 2	IMDB	Rotten Tomatoes Review
Find Me	IMDB
Splinterheads	IMDB	Official Movie Website