Location based information … information on how to get … information!
I really think this is a great idea for a cool web service! These guys have written a really cool application that consumes a FCC database and let’s you know what radio and TV stations are in your area. Very cool! If converted to a web service then anywhere in the United States that you might find your self, you would be able to detect what stations are around. This would be great coupled with a GPS and a wearable computer … and if the wearable had a radio/TV tuner peripheral …

Station Location and Information 1.0. Search and display AM, FM, and TV station information. [freshmeat.net]