Nice use of Arduino and Skype API to control a webcam wirelessly. (Windows-only)
[HARI] provides all the sourcecode as well.

• SkyDuino Windows (At the remote location, you need this and Skype)
• SkyDuino Sketch (You need to upload this to the Arduino)
• SkyDuino Windows Source (if you’re interested in the C# source code)
• SkyDuino Fritzing Diagram (How to connect the Servos to the Arduino)
• How to build your own pan/tilt bracket