Hey guys does anyone know, or has anyone created a web text app for North America? I've seen the one working for Irish mobiles "WebTexter" but none for here.

I've seen two for the iphone "SMSenger" and "freetext" just wondering is there one out I can get here. Hate the charges for sending messages, I'm trying to get everything down to data so I can get a cheap data plan and be done with all this other crap!