A friend of mine lost a laptop the other day and unfortunately, there was no way to locate it . It got me thinking about solutions for locating stolen laptops or for that matter, most electronic hardware. Most of the solutions that I've come across e.g Adeona at http://www.linux.com/archive/articles/148197 do not impress me much because all it would take is a software(O.S) re-formatting and the tracking application is gone. The privacy part of Adeona is impressive though.
What I would like to know is, does anyone know of a hardware solution that could be used, such that even if the machine is formatted it would still be able to send location information to a server or some email? (I've seen someone who actually included a pet tracking chip on their laptop, well hidden from view!).