I need real-time US retail gas price data. The data needs to be
reliable, and of commercial quality capable of being used on an online
service where users would search for current prices by entering a
zipcode.  The best information will provide as close to primary data as I can
get. I am willing to commercially license this data.

The resulting service would be similar to AAA's
http://www.fuelgaugereport.com/index.asp. That page lists two
companies OPIS and Wright Express as source of data. I am looking for
better contact information for these two companies (might require
phone calls to them) as well as alternative sources of gas price feeds.

Some other volunteer provided data links are here:
http://www.sandiegogasprices.com/USA_links.asp