yeah, I know for a fact that University of Wyoming out of state is cheaper than in state at Colorado State University (for undergrads). For professional programs, there are programs like WICHE for Vet school and WWAMI for medical school that keep tuition at in-state levels for students from qualifying states. I also think that CSU tuition for out of state may be cheaper than in state for some schools (UC perhaps?) - I don't know that for a fact, but I think I remember it lurking in the cobwebs somewhere...