ooh this gives me an idea for a cool script.
something like an app I saw awhile ago.

when an sms is recieved and the body contains text of a specified kind so say a password
"12345"
then the script will start an alarm.
the question then is.
Can I have another script that will detect the phone being unlocked, so that if can then send out an sms to the send of the orignal.
so I find the code and start an alarm.
The user activates the phone and an sms is send back with the gps location of the phone.

could be cool for find your lost phone :-)