Geospatial alarm

I fall asleep on the bus occasionally.
Done right you get a good thirty minutes shut eye. Done wrong you miss your stop.
What I want is a geo alarm - wake me at this lat, long.
Google latitude is close (remind me to check in at x), but not quite it

Updated:
http://stackoverflow.com/questions/12028928/android-simple-way-to-make-a-geofence

How to feel happier

On your way to work, drive in the bus lane, just ahead of a bus.

Everyone will wave at you, to which you reply from your lowered window at loud volume: good morning to you, too.