Thanks John, that was very helpful.

>>>>SMS certainly opens up a HUGE amount of connectivity for us as developers!
>>>
>>>
>>>We are going through this very thing for a client. You must register with each carrier's content aggregator who then issues you a short code that you use to identify who/what you are doing.
>>
>>So far, I have just been emailing the different carriers Email SMS gateway.
>>
>>Can you point us at a bit more info about codes and content aggregators?
>>
>>Thanks!
>
>
>Just do a google on SMS Content Aggregators and another on SMS Shortcodes. You'll find tons of info.