I like taxi. I think this is a good idea. I hope in my city also accept bitcoin. because everyday I use taxi.
I heard uber was considering the use of bitcoin, but I'm not sure. I don't really think it will work in a near future though because the fees are still to high, so paying a taxi, that normally is already expensive, will become even more expensive because you will be paying fees for the transaction. It would be much better for users to just pay with fiat.