Continental also flies a daily 757 between Houston and San Antonio, which is a shorter flight than the Houston-Austin leg.
It's amazing how many flights are offered and which aircraft are used on routes between those Texas cities: Dallas/Ft. Worth, Houston Intercontinental, Houston Hobby, Dallas Love Field, San Antonio, Austin.. and plus there are many flights between DFW, DAL, HOU and IAH to ELP, along with a several flights between SAT, AUS and ELP. Lubbock, Midland and Amarillo are also all connected with flights to cities in Texas.
Sorry about that... I just get amazed when I visit airports in Texas, especially DFW, IAH and SAT, how many intra Texas flights there are.