450414 iPhone App with GPS Locator

We would like to create an iPhone app with the following main capabilities: - With the phone in idle or sleep mode, it would be able to determine your location via GPS and Google Maps without actually opening the App (running in the background which I believe is possible with the new iPhone OS???) - When you enter a specific business address location from our database, a push button notification would appear that would say "Are you at XXX Store? View coupon" or something similar. - Businesses would register and pay for their deals on our website. We would also need to create this app for Droid.