WiFi Shield with Phone Application

The project will be for finding your keys/remote. We want to use a phone application to communicate to our microcontoller and have the microcontroller relay the signal to a rf transceiver which will communicate to the receiver on a keychain or remote.

Thanks Paul for the information. It seems as if WiFi would be the hardest way to go. I will defininetly look into the ethernet shield for the microcontroller.