For any instructors out there, Curt was showing me the V1 iPhone app at the Barclay's and it is quite nice.
Worth a look for those times you want to catch some video but don't have your camera setup.
I use my iPhone all the time for teaching as well. I don't have a range at my facility, so I am constantly traveling to meet people. So much easier than hauling the camera and tripod around. V1 on the iPhone is great, but I use Swing At 'Em golf most of the time. Incredible little app...
Here is a great little invention you can use along with your golf bag or cart as a tripod.