Forgot to mention this.

My dark skinned friend tried it. It did bit work. This raises some troubling issues with some people.

There was a big affair recently in US with HP releasing a tracking web cam that worked only on white skinned people. The company got a lot of bad publicity for that.

Article:
http://www.cnn.com/2009/TECH/12/22/h...ams/index.html

Klen