>>>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.