No, they don't allow for group txting. And Apple can "suck it" on this account too.
I have a group distro that I created by txting everyone I wanted on the distro the first time. Now, I go back to that sent text each time and just delete the old txt message and paste in the new.
Stupid method, but it works. Funny how AT&T and Apple don't think we'll find a work around for the things that "everyone" else allows by default.