May be a long shot, but these guys are in Dripping Springs (is that hill country?):

http://www.bluehorsebuilding.com/

It's a design/build team. I know they have used Steel SIPS for lots of structures. Good luck getting in touch with them - I emailed and left voicemail but never heard back. Was probably out of my price range anyway!

Yes, Dripping Springs is just west of Austin in the Hill Country.

Our office had a luncheon with EH Systems out of New Braunfels.
Here is the info of the presenter.
EH Systems
Allen Scarborough
830.632.1534
[email protected]
www.ehsystemsllc.com

I am just finishing up a new 3000 sq/ft SIP home in South Louisiana. I searched far and wide for SIP builders and finally picked Triton Builders out of Mississippi. They did a fine job and I know they travel. They finished my job and headed off to Houston to fix up a SIP job some other builder botched and got fired for. Contact Trent at 228 323-0353.

Hey LASwampman, where in south LA are you? I'm in BR.

I'm down in Houma. I needed something high and strong because after evacuating to BR for Gaustav last year, I'm not leaving again. My new house is built like a fort so let it blow.