In Netherlands (a country that seems particularly amenable to technical innovations - the woman on the image is the Dutch Secretary of Economy), the first fueling robot of the world in practical use has been introduced on some gasoline stations, called TankPitstop.
In Europe, where self-service on gasoline stations is a rule, drivers might not be unwilling to get their car fueled by a machine (though fast-paced ones will prefer to remain at performing it by their own, considering the rather easy-going pace of the fueling robot).
The video is nice - however, I wonder how many cars got scratched before that worked reliably. ;-)
Not a NXT robot, but maybe an inspiration for one that can fuel some of the new LEGO® TECHNIC trucks...