Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
purpse,where do you get 1,5m accuracy with GPS using civil equipment? I rarely get the 15m
I wonder if there is a way to "fine tune" the range by shielding the dongle in some way?
seeing as we are looking at options that are 'outside the box' you could set yourself on fire and use a 1-wire temperature sensor to detect you presence.
It is quite obvious, that all you need is a kinect in every room, which has learned all occupants of the house, and LinuxMCE is using it for follow me.