https://www.uber.com/ An interesting "black car" service much in the way as G7 works. You basically sign up for the service and download the app, then when you need a pickup you use the app to summon a driver -- assuming you're in one of the participating locations. They send the driver over and charge you based on distance (plus a base fare in most cases) and when you're done you step out and that's that -- your card on file is automatically billed and you don't have to do much else. The service is currently available in a handful of US cities (the usual suspects like NYC, DC, SFO, etc) and Paris. The rates are listed on their site and seem to be calculated at a variable rate based on distance/time -- over 11mph you're charged for distance but in traffic you get charged based on time. The fares are terribly expensive compared to a regular cab but surprisingly competitive when you compare them to a car service. And after all you're paying for the convenience of being able to summon a Town Car on command, rather than have to stand on the curb and hope someone shows up to take you to the airport. Time will tell if this is successful... I suppose it will be based on how many people adopt it and whether or not they add more destinations.