I was accepted off of the waitlist on Monday or Tuesday of this week. I politefully declined because I had already gotten in off of a different waitlist earlier this month. The information came via a call from Dr. Kelly, she left me a VM since I wasn't at my mobile phone.
Prior to getting off of the waitlist, I was interviewed in the middle of February and thrown into the acceptable pool a few weeks later. I sent a letter of strong interest immediately following, and then letters to my interviewers a few weeks later.
PM me for additional questions. Best of luck.