Oh I quite agree that there are more sources of environment/contextual cues than just WiFi (which just happens to my main interest as it comes as standard and I don't have a GPS!) GeoClue definately has potential to allow the device to modify it's behaviour according to location. Designing a systema and interface to support all of this functionality could be quite a challenge though!

@Texrat - no problem fella, but I'll start charging you next time!