This looks like a more fluffy version of remote tracker.
http://remotetracker.sourceforge.net/
It's a command driven tracker that can do locates via sms/email, look up call logs etc. The cool thing about it is because it's command driven you can tell the unit what to do and who to do it for.
Using phone "A" I can tell phone "B" to report the location to phone "C"
That's an example.