7 Essential Tips for Photographing the Moon. This is great! Gives great ideas and even though a couple were kind of obvious, the "iphone photographers" will understand why they cannot do this. And also will increase your knowledge a bit too!
This App is awesome. If your camera is ever lost/stolen, you can download a photo you have taken (with the embedded serial number) and it will search for matching serial numbers posted on the internet, so you can see if anyone is using your camera and posting images from it.