An Apple iPhone owner who just happens to be a clever DIY-er felt the need to add some projector capability to their Apple iPhone without actually a projector to the handset.
So he used his iPhone in tandem with a 5 x 7 laser matrix, five 8-bit D latches for controlling the laser pointers, a micro-controller, and a touch code for the iPhone, and can now apparently spell out messages on a wall.
Kind of cool thing to do, and over at hack n mod, they have a video showing how to make a laser matrix projector for the Apple iPhone, which you can view by following the link.