Hmmm definately gave me ideas. As for getting the phone number... just sent an sms to a backup number if the sim changes.

Should probably be possible to do this through a shell script even. dbus-send and a cronjob ought to do the job.

And why not scramble the lock code as well while at it. So tat even if the phone get's reflashed it cannot be relocked that easily.

And I like the webserver idea to fetch a file. But yeah being able to send an SMS to the device to get such info would be good as well(iirc SMSes can come to different ports and even be hidden from the reciever/sender). So that would be great.