Waitlisted for MIT as well... I got the exactly same email. They said they might notify you by April 17, which is after the April 15 general deadline. Might just choose another school..
Sure, I am an International Student receiving BS degrees in US and currently a MS student. 3.97 GPA, worked in a neuroscience lab for 3 years, strong LORs, two first-author and two co-author papers in preparation (maybe shouldn't count since has not published yet).
I saw on the result page that some one got interview invitation from Wisconsin-Madison several days ago. Does anyone who got it could share the interview date? And will they send out more soon?