iPhone's GPS and local awareness

From the Appstore you will find a huge collection of applications taking use of the built in iPhone GPS. Based on your location, if you give the application permission to locate you, will give you filtered information about your surroundings.
A good example is the application WikiMe giving you information about close by location from the main source Wikipedia.
This local awareness application are divided into different categories. I will give you a small list of some of them:

Yr.no - Weather forecast
Local Picks- Restaurant guide
ClickonRadio- Radio stations
WikiMe- See above description

Just try to type GPS when searching Appstore and you will find several more.