I finally stopped by:
Great Health Nutrition
4815 W. Braker #530
345-7897
Austin 78759
Hours: Mon-Fri 10-8 Sat 10-6 Sun 12-6

The store is great and carries practically every low-carb product that you could order online, at the same or lower prices.

The clerk there, who I assume is the owner, said that she had been out of the country for a couple months, and that the store is not doing so well. She was really friendly and helpful, and gave us TONS of free samples. She asked me to tell all my friends about the store, I assume to increase business. Unfortunately, I don't have any low-carbing friends here, so I figured I'd try to tell any Austin low-carbers that I could find.

-e.