And it's still the text message.
Amazon have started doing shopping by SMS:
"Amazon TextBuyIt, which launched late Tuesday, lets people text the name of a product, its description or its UPC or ISBN to 262966 (that’s “Amazon” on the keypad) from anywhere their cell phones work — including from inside physical stores."
I don't think we've seen the half of this kind of stuff yet.
People know how to send text messages, and no one is scared of doing it.
So as soon as you start to think of text messages as peer-to-database, or peer-to-database-to-peer, as well as peer-to-peer, a whole other world opens up.
The only reason things like text shopping won't happen is if people love their mobiles and the intimacy of SMS so much they shy away from using texting as a functional tool.