Don't know if it can be done...
I would like to see an option that would let you restrict your results to a specific city or even state.
I live in Nebraska, but my home is less than 4 miles from Iowa where gas taxes are cheaper. When I get the results, even for as small as a 5 mile radius, I get a list of Iowa gas stations and never the prices at the stations closest to me.
It would help me out if there were a way to filter my results to Omaha, NE or even just Nebraska.
Its the downside to living on a state line I guess. Great widget otherwise.