txt messaging add-on.

Just wanted to give everyone a heads up and this might be common knowledge, but you can call up AT&T and get unlimited txt messaging to AT&T customers for 5 dollars extra a month.

I was concerned I've always been very anti text messaging when I had my razor for 2 years because it was a pain in the ass. But with the iPhone you can fly and it's actually nice.

Now anyone know a way to get this and save my 5 dollars? any promos out there?