An iPhone-controlled Wi-fi quadricopter. Hell yeah. I probably can't afford one, but in a few years toys like this will surely become more available (financially) to us mere mortals.
Website:
http://ardrone2.parrot.com/parrot-ar-dr ... index.html
Here's one of their videos, a 10-second clip that shows how it can be controlled by tilting the iPhone...
Now there's one damn cool remote control idea, -- iPhone or not.