Thai House (at Burnet & Research)
This place went through several incarnations (Bangkok Cuisine, Thai Passion) , and is now Thai House.
Only Thai buffet in town now.
2-for-1 lunch buffet on Saturdays and Sundays.
Sounds like a good deal. Haven't tried it, though (since the change from Thai Passion to Thai House); will update.
620 Congress Ave Ste 105, Austin, TX 78701