As a tech blogger, I use the iPhone's screen capture function (power button + home button) on a daily basis, which makes it all the more frustrating I didn't think of this first: using it to crop photos.
After reading this post on iPad Insight, it seems so obvious. Simply pinch to zoom in on an image, position it just so, and hit the power button and home button to capture the newly cropped photo as a new image in your camera roll. Done and done. It works on both the iPad and iPhone (and presumably the iPod Touch, … Read more