@milhouse: yes this is our approach. Once you setup a wifi it asks if you want to "attach" to a location pretty much like apple's location manager. Then it can "detect" where you are based on that. For the car, we plan to use the obd2 bluetooth signal =) I think that this will not be in the next release, as we are going to work quite hard to make it work flawlessly. But the "infra" to do that is shaping up quite well, and that's the most important.