Ed contacted me recently with advice for Aziphone (an iPhone rental service in London), and I found out about his startup, which I think is a really cool idea to explore.
From Taxi.to
taxi² enables you to recognise other travellers who are interested in saving half the cost of their taxi ride from the airport to their final destination. The clever taxi² ticket provides you with everything you need to share a taxi: an easy way to find someone to share with, maps to compare your destinations, instructions to your driver, and …