From what I know of the pre-sale, tickets were supposedly will-call only and not transferrable. I don't know if this applies to tickets purchased in places that aren't NIN.com though.
Also, another DFW traveler checking in! I've blocked off my vacation days so that I'll be in San Antonio from Friday night until the day after the concert, so I'm totally down for pre, during, or post-concert meet-ups. Let's get something going guys!