Arduino movement tracker (with Servos)

Hey guys,

At the moment I'm working on an aspect of a larger project and I'm trying to construct a tracker - something which can essentually follow a moving object. "The fish following the finger" trick you tried as a kid would be the closest idea.

So far my test setup is pretty basic. Couple of servos hooked up to a TLC5940 and a URM37 providing the distance measurement.

Over 180 degrees it takes a reading and simply chooses the closest measurement.

You can check out the concept here (mp4 video or .rar)

[edit] with laser (everyone loves lasers right?)

Anywho, I've been searching around and I've not actually seen any examples. I know people have done something similar for nerf guns and various other turrets. Does anyone have any handy links?