Meant to be Seen

I found this neat peace of software which is free: http://www.free-track.net" onclick="window.open(this.href);return false;
The device needed can be build for penies.
Here is how it works:
http://www.youtube.com/watch?v=l8K-wo_QWBY

there already is a topic running for this with even some hardware built by me and others..check it out, more info there..