I know there are more inexpensive and functional ways to keep tabs on temperature in your grill, but there are none cooler. Enter the iGrill bluetooth thermometer.
It is a stand alone meat probe style thermometer that also comes with an app to link directly to your iphone or ipad via bluetooth. Features include safe cooking temps, color temps, timers and recipies. At $100+ its not cheap, but it is super geeky and cool. iGrill