Sweden has had a long history of paying for things with your cellphone. I remember hearing years ago about vending machines that would bill your cellphone account for whatever delicious treats you wanted to vend. Now, the Swedish postal system has decided to offer a service that allows the use of a cellular text message (SMS) to pay for postage. The user sends an SMS message and service will send a special code back. Just write this code on the envelope in the place of a stamp to verify payment.