I do. I really like the idea of a remote controlled car, with a camera that feeds the iphone screen, so I can have a view from the driver’s seat. Even better - the same thing, but with a plane/helicopter.
Imagine being able to fly my iCopter, sitting at my office desk, and watch everything from a bird’s eye… awesome!
I helped create a web site / app that worked as a mobile coupon tool, to save people cash in the recession. But that’s not all sexy… so I’ve been thinking of making a relatively useless app called iEye, which would allow an iPhone user to “look up from their iPhone, without looking away from it” by showing nothing but the video stream from the built-in cam…
One of the coolest and most creative recent apps for the iPhone, as I think you mentioned above, is Square (the mobile credit card processing app/device). Another cool one is the metal detector app, though that’s not game changing…