To my knowledge, they still cannot. If it ever did become legal, I would be available to play a 6/12 game every once in awhile. My g/f's parents are in Chicago, but we're currently in St. Louis.
According to the Missouri gaming commission lowball is legal in Missouri...but I doubt it's ever been run before. I doubt any of the casinos have written internal controls on the game either. I could bother to ask a casino here, but I have a feeling they'd just laugh at me.