Creative Applications for SMS?

Spinkle asks: "As the volume of global SMS traffic continues to grow at a staggering rate, new and more creative uses for text messaging are found. SMS text messaging is now achieving critical mass worldwide. Sites like Snifferdogalert and Velocity (which, incidentally, cater to drug dealers and speeding motorists, respectively) are an illustration of the increasing popularity of the SMS facility. A culture change is taking place in the way people choose to communicate. Will the visual message become more powerful and popular as voice? What other creative applications for instant messaging are there?"