gps tracker for macbook pro?

i want to buy a macbook pro but i understand there is no theft protection. is there maybe something i can have in my laptop or something to be able to track it like if it gets stolen. i know that mobileme tracks iphones and can tell u exactly where it is. does something like that exist for laptops?

or can anyone remmend me a place like best buy where they include theft protection?

perhaps something i can get installed?? anything other than the answer "theres nothing u can do if its get stolen" would be great!