I also heard that the school would get back to me in 24-48hrs, but Dr. Brown told me that the decision could be delayed depending on when the admissions committee would meet again. My advice would be to give them a call, although their phone doesn't seem to get answered often. Try calling Dr. Brown directly! When I went to my interview I was pretty much set on going to PCO and maybe Pacific, but after the trip I began to lean towards UMSL. I've pretty much narrowed my choices to PCO and UMSL.
Are you from the St Louis area?