Partial text of the e-mail is below.
As part of the continuing evaluation of your application, the Admissions Committee is pleased to invite you to interview with a Columbia Business School Ambassador. Ambassadors are alumni of the program who volunteer to conduct interviews and can answer your questions about their experiences at Columbia Business School. We strongly suggest that you arrange your interview within two weeks of this invitation.Now I need to worry about my other apps. They're due in 2-3 weeks, and I haven't completed a single application package. I also have to start hounding my recommendation writers.