Don-
I grew up in Amarillo, TX and went to Texas Tech for a while and I agree with all of the 9-hole courses. I actually played my first round of golf at a 9-hole course in Haskell, Texas. I still go back every summer and play in the 2-man scramble with my grandfather. As for a few other 9-holers that come to mind in West Texas are Shady Oaks in Baird, TX, Floydada CC, Friona CC, Canyon CC, Island Oaks in Idalou, Tule Lake in Tulia, basically name a small town in west texas and put CC behind it, and they have a 9 hole courses.
One unique course is McLean CC, I believe it is the last course in Texas with sand greens. We had designed a 6-hole course for Boys Ranch, hopefully we can get that going soon.
Also, about 90 minutes west of Amarillo, a new Nicklaus 9-hole course has opened at Ute Lake called 12 Shores. Its a pretty fun course, I was the only player the day I played and made it around in 4 hours for 36 holes. They plan on adding 9 more holes, but with the economy who knows when that will be.