Hi
I think it would be nearly impossible to get back a stolen notebook.
I read a lot about some solution to track an stolen notebook (tracking of Mac address as mentioned above, installation of some 3rd party software) but all these proposals are not “really” an solution…
As far as I know Toshiba provide an database for stolen units.
http://eu.computers.toshiba-europe.com -> Support & Download -> Stolen Units
In worst case (unit has been stolen) you can register you notebook there.
This can help to track a serial number and help an ASP to identify an notebook as stolen unit.
Greets