I am not sure where but I remember reading in a thread that U Rochester has not filled its class yet. My interview is on March 8th, so I am only a week ahead of you and nothing was mentioned about interviewing for a waitlist.
interview there, its an awesome school. that was towards the top of the list after all my interviews (didnt get in, of course). they have really awesome facilities, the people seem really cool, and they have strong academics. only minus -- its in rochester.