OK, this is probably an odd question for this message board, but...I want to be able to have clients send me SMS messages via my web site. Currently I can create a link that takes them to an outside source to do this, however I would like to do something that integrates it into my web site without them leaving. I'm guessing this would probably require some sort of PHP script or something. Does anyone have any suggestions? I want the whole process to be as transparent as possible...

I'd like something similar to what sprintusers has at:
http://www.sprintusers.com/tm/

but of course on my page, with my phone number already in there...