Thats something I need for the cat maybe with a proximity detector to set it off.
Hours of fun, although cats being cats, it will probably just savage the servos.
The more conventional mounting for pan/tilt servos is to have the pan servo on the bottom and the tilt servo on the top for easier aiming. Below is an example that keeps the aiming more conventional.
I just tried out your webcam - very cool. Though I suddenly realised its four in the morning where you are.
Hope the whirring of servos didn't wake you.