I got one of those letters the other day too. I called Jordana to ask for clarification about it, since I thought it was another way of saying "waitlist," but she really stressed to me it's not a waitlist. The school is basically putting your application aside- the admissions committee has neither rejected you nor accepted you. They are going to review your file at the next meeting. She informed me that Mercer starts their official waitlist in April/May (towards the end of their interviews). Basically, she was saying you still have to be asked to be on the waitlist. So I guess this letter is sort of another type of waitlist in terms of waiting longer to see if you are officially accepted or extended an offer to be on the waitlist. Just thought I would share what I was told.