If someone could get into a deal with symbianguru to help port their symbian app Phoneguard onto Maemo all would be well. I wouldn't mind buying such an app.

phoneguard works such that you can send sms that consists of a keyword to the device and it would send back the requested data or lock the device or sound the alarm. it also sends back network info like imsi code, sim number is sim has been changed and other data. gps co ordinates can also be sent if the device has acquired lock.