When activated MacTrak uses the web camera to capture images of the thief and uploads them with location to your Flickr account, and email.
Remote activation is simple. Open a web browser, or use your iPhone to log in and click the tracking button, the next time your system connects to the Internet the software will activate sending data and images to you.
There are a number of other products and companies that can track your Mac including LoJack and Undercover. While both programs have some interesting features (Undercover in particular does some things I'd like to see incorporated into a future version of MacTrak, such as taking screenshots as the thief works and simulating a hardware failure to force the thief into bringing the machine in for repair), evaluating them should be saved for another article.
(Source: TidBits) | Cost: $24.95 1 Year Licence; $59.95 Lifetime Licence (one time fee with no annual subscriptions, the license transferrable to a new device. | For further info...