Portable Mac Security

I have a Macbook and I occasionally travel with it.  I'm always afraid of having it stolen - especially since my laptop bag is also my camera bag.  So I've been in the market for a good service that would help me get my mac back should it be stolen.  Enter Undercover 3 a service that helps you/the police to find your laptop when it's stolen.  The article does a better job of explaining it than I could, so you should click the link.  I'll still look at other services that do similar things, but something about having my computer start yelling that it's stollen sounds fun to me.