Just found this via Kyle McDonald – move the mouse, and the page will show you a photo of someone pointing at wherever your pointer is.
Kyle took it apart some more and even made a realtime version in C++ and openFrameworks. Here’s a video of it in action.
The project’s creators StudioMoniker actually made a real-time version themselves, but this time the pointer shows camera flashes in reflections.
Paul Irish further tears down this project on this rather interesting video.
pointerpointer.com by StudioMoniker, and the real-time version with flashes.