Lenovo is working with Phoenix on a BIOS that will let you disable a ThinkPad notebook PC by sending it an SMS text message. The feature should be available early next year, reports TG Daily. The story says:
The lockdown will happen immediately if a notebook is turned on or, when it is turned off, the next time the system signs on to a cellular network. To reactivate the disabled PC, a user needs to enter a pre-set passcode created during notebook startup.
I think it is a first step in GSM enabled laptops