Made a Rube Goldberg machine for physics class. Here's a 3d model of part of it. I didn't render the dominoes or mousetraps. Orthographic and perspective views both there.
Eye tracking is pretty easy to do. You just define an object or bone to track, and which axes to use when calculating rotation. Then I had a burst of inspiration, and decided to make the head swivel too. It rotates using the same guidelines, but with influence set to 30% so it doesn't move as much:
These upload a lot faster when I've had a chance to convert them from a ~70mb AVI to a ~130kb WMV. The treasure chest one I posted before was made on a different computer, which didn't have Sony Vegas, so I couldn't convert the file.
Rigging is just about done! Some little issues where I messed up the vertex groups a teeny bit. Rendered at 1920x1200 with 6 levels of subsurfing because my computer is that awesome.