The new SMS tickets in the Stockholm subway are mighty convenient. They’re a bit more expensive than the paper kind, which is a bit weird if you think about it. I think it’s because otherwise the textually challenged (i.e. everyone over 35) would feel discriminated.
Update 2007-02-09: As Jim rightly points out via IRC, not all people over 35 are uncomfortable with texting, our fathers among them.
The point still stands, though: they could have priced it at parity with the paper tickets, as I believe the cost of the service is offset by the savings in printing and distribution of the tickets.