Ask YC: SMS Application, any help?

I posted a similar question a while ago, and had a good response... http://news.ycombinator.com/item?id=119395

Could you make it less "push", so that when someone sent a special message to http://www.textmarks.com/ service, then textmark was configured to fetch the info from your URL, and respond ?

Are you sure that in West Africa receiving text messages will be free, and that you will be able to do international text messages ?

We use a number of SMS providers. By far the easiest to integrate with is clickatell.

J-mango does SMS as well - both income and outgoing. Check out the video at http://www.j-mango.com

There are loads of services that bulk sell SMSs. You just fire off some XML to their servers and they'll send the message and then when you receive one, they just fire some XML back to you.

Shortcodes can be quite costly. Some people use http://www.textmarks.com/ instead, which is a tradeoff on usability for being free.