Location services haven't yet captured my attention; while there is potential, it remains that. This post quickly surveys a number of location services such as FourSquare and Yelp. I think the deep insight here is to draw out what already exists and is successful: "Location-Based Services have existed for years, of course. And they are extremely useful. It's just that they rarely get any popular press. Developed by deeply unglamorous people like SAP, the real use cases are mostly B2B and corporate B2C." Like fleet vehicle tracking, parcel tracking, and the like. In the consumer space, we're still seeing teenage faddish type stuff. For now, at least.