Could you make it less "push", so that when someone sent a special message to http://www.textmarks.com/ http://www.textmarks.com/ service, then textmark was con

Could you make it less "push", so that when someone sent a special message to http://www.textmarks.com/ 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 ?