Akbil

I'm really well impressed with Akbil. This is a small gadget people use to pay transports in Istanbul. With Metro, buses, trams and boats you just push akbil to the machine and get in. It works as an electronic pocket money, you charge it on machines around the city with the card or paper money, and the credit is stored inside it, somehow.
It reminds me PMB, this portuguese electronic pocket money card that appeared about 10 years ago and disappeared some time after. I was reading about this (read "Potenciais perdedores com o PMB") project failure and it seems the problem was not security as I thought.
Anyway, this system really works in Istanbul making transport payment a lot faster!