I have to agree. I love Houston but I left it for San Antonio because the tech scene in SA was much more lively with Geekdom and Techstars. Though I'm now in Boulder I've been keeping in eye on SA and there's a lot of cool stuff going on there, plus the VC activity has really picked up—multiple $1+ million rounds have been announced or will be announced in the next few weeks.
I am a part of the young tech startups in SA and I would also suggest for anyone to come back or give it a look see. I transplanted from SF and find the playing field wide open for new opportunities.