I live in Texas, but went to school in Oklahoma. Up there, I discovered a burger at a few places called a Theta Burger. It's bbq sauce (usually called Hickory Sauce though), shredded cheddar cheese, mayo and dill pickle slices. There's one place here in Austin that I know of that serves this burger, but outside of Oklahoma, I've never seen it.
I've tried looking it up on the web, but can't find any info about it. Does anyone know where this burger came from?