IMO, I Am Here was doing it wrong. Part of the problem was password and intercepting SMSs. What the N900 should do is log wifi points, GPS every 10 minutes, etc. When an internet link is detected, spill the beans.

That way, there's a better chance of tracking the phone. Even if you don't know where it is now, you know it goes to work every day and where which, IMO, is more important.

Also, it can be used for statistics when not an anti-theft measure. I'd love such an app.