Another off topic posting. For an information security blog - I'm not doing so well... but then I never promised that I would. And this is my second post in one day!
According to the wikipedia: The first commercial SMS message was sent over the Vodafone GSM network in the United Kingdom on 3 December 1992, from Neil Papworth of Sema Group (using a personal computer) to Richard Jarvis of Vodafone (using an Orbitel 901 handset). The text of the message was "Merry Christmas".
That was 15 years ago. According to an article in itweb SMS revenues are to hit $67 Billion by 2012. Their source is Portico Research.
Thats a lot of beep-beep-ing money.