simple iphone app shell... gps possibly?

I want a simple iphone application that displays a name of a place, address, and a rating depending on the input of a particular area of the city, in a list format (for example: choosing EastVillage will display nearby list of places with the locations and ratings. I am a graphic designer so there will not be a requirement to design anything, just a basic shell and simple howto instructions for me is fine. I am open to which type of dynamically driven data system you would prefer, xml, php, etc... i just would like the option to have an easy way to keep adding locations in the future. If there is a way to incorporate GPS capability that would be very lovely...