After pulling off 3 different exits near MSP and not finding a gas station and then having to pay the uber-rates has bugged me forever....MSP is not the only one; ORD and several others come to mind.
#1 is there a site that perhaps has links to map quest/blast showing a gas station with hours (open early/late, etc.)
#2 if not I'd truly appreciate one....sort of a seatguru.com for people renting cars and returning to airports....