As a bit of a follow-up to my Public Retail Gasoline Pricing Database entry of September 6th, I thought it worthwhile to note a very interesting web application that a friend put together (which he was coincidentally working on at the same time, though neither of us was aware of the other's activities in that realm). You can find it at http://www.keeptrackofit.com. It's innovative in the way that it includes Google Maps as a core element of the interface. That makes sense given how critical proximity is to our market choices.

It doesn't fulfill the need for total coverage and absolutely up-to-date pricing - which would only be achieveable through government regulations - but it's definitely another step in the right direction.