I think a better system for tracking stolen items is an absolute must: I have had two iPhones, and two MacBook Air's stolen. Thieves turn off the iPhones immediately, and as far as the MacBook Air is concerned, the thieves would have to WANT you to find them. Needless to say, after 1 and 2 years respectively, none of the devices have ever come detectable on Find iPhone.
This morning I left my MacBook Pro on a train (I know, I'm useless), and it was sleeping, connected to the London Transport Wireless, but if it hadn't been for a saintly human being who contacted me via Facebook, I would have to fill another insurance claim. There should be a permanent tracking facility, full stop.