I just got an interview request from Mercer, Feb. 16th. I applied last minute too. Happy happy, joy joy.
At UMB, they said that they do not do rolling admissions anymore so the people who are interviewed last still have the same chances of getting in as the people who interviewed first. As a result, we probably will not hear about acceptances until early March. They also said that they are accepting a larger class this year because they are beginning the satellite program in Shady Grove. So, there is a good chance that you will get in assuming you don't completely freak out during the interview.
Best of luck to all!