Cellular + GPS tracking, all in one, for your Arduino? Oh yes! Introducing Adafruit FONA 808 GSM + GPS Shield, an all-in-one cellular phone module with that lets you add location-tracking, voice, text, SMS and data to your project, in Arduino shield format for easy use. Www.adafruit.com/product/2636 #fona #adafruit
1Sheeld: Replace your Arduino shields with your smart phone! by Integreight, Inc. — Kickstarter. Imagine an Arduino shield that can be configured to be an LCD, GPS, Wifi, or any shield you may think of!