Mobile phones and PDAs can now spot theaters and showtimes by how close they are to the person scouting for a movie, thanks to the first GPS-enabled movie guide offered in the US. <A HREF="http://www.earthcomber.com">Movies on the Move,</A> a free download for Palm OS and Windows Mobile-powered handheld devices, is available on Earthcomber, a website that provides mapping and local data as well as personal navigation software. The detailed listings of movies, showtimes and theaters are now part of the local information that comes with maps for every region in the United States. The guide itself, which carries reviews, descriptions and images of the movies playing, is an additional download for high-capacity devices.