Gonzo.. if i may
SMS billing, in effect is a method of utilizing surfers with cell phones in order to efficiently bill for content access, whether that be MMS media files or paysite access.
In effect, the surfer text messages a pre-set number with a specfic 'code' and each day, the surfer is sent a new text message from the SMS carrier.
As long as the mobile user
reads this text message each day, they get billed for and, can continue to receive access to the content.
I have an article on SMS / MMS billing on GWW which goes into a little more info here..
http://forums.gaywidewebmasters.com/showth...=&threadid=1911
The main problem that faces SMS billing providers especially in the US is that for all intents and purposes, the US is still way behind the rest of the world with their cellphone technology.
In fact, 5 years ago i could order a weeks worth of groceries from my cell phone in the UK whilst this still hasnt been introduced fully in the US market.
Hell, even those cell phone cameras that have been all the hype recently in the US were being used globally at least 3-4 years prior to their launch in the US.