The folks behind the iPhone Blower app have given us another gem: An app that lets your iPhone move nuts, scoot pens, and knock over dominoes. Yes, it's freaky. Yes, it's magic. Yes, the way it works is simple.
The Magic Mover app uses your iPhone's vibrate function to move things while a little on-screen bulldozer pretends to be doing all the work. Neat party trick.
The app will cost you a buck in the iTunes store, but you should be able to recover that with a quick "I bet my iPhone can knock over those dominoes on its own." [iTunes]
Heads up: When I tested the app on my iPhone 3GS running iPhone OS 4.0 Beta 3, the app did not work as advertised (my iPhone didn't move despite the cute sound effects). This is most likely due to the fact that I'm using a beta build of the iPhone OS, but still worth keeping in mind.