As we were all painfully aware, it took AT&T forever to bring MMS to the iPhone. A new app has just been released that hopes to one-up it.Knocking, made by Pointy Heads Software, is basically a photo-sharing app on steroids. With it, you can pretty much instantaneously share up to 100 photos at once between two iPhones. This works by establishing a connection between the two phones, during which one users selects another user with the app and "knocks" the pictures over to them. The video below shows just how simple and fast this process is.