It's been a long while, but let a former resident chime in.
This might be totally outdated information, but it wouldn't hurt to check it out. I don't know if these guys are even still alive, much less living in Austin, but here goes...
I used to work at Whole Earth Provision Company and they know who the best climbers are and how to get in touch with them. Ask if Keith Guillory still works there, and if they know how to get in touch with James Crump.
And Enchanted Rock is definietly worth the trip out there. No big multipitch routes, but probably the longest and most interesting you'll find. Great pink granite and killer views of the Hill Country. James Crump wrote the guidebook for it, if it is still in print.
Good luck!