Sorry, more information here, was in a rush but wanted to post ASAP earlier. I'm 32, male, US citizen, non-traditional background, located in San Diego, California.
The email indicated that they are going to be in Los Angeles (about 2 hours away from me) on March 3rd/4th and gave me the option of when I interviewed during those two days. There were a lot of slots available. It's clear they made an effort to match me with a local interview option, though there was a possibility of choosing an on-campus option. The email also contains a unique applicant code that you use to log in to the interview-scheduling portal.
My applicant page on the Sloan site doesn't seem to have changed. The status says "Complete and being evaluated," which I believe is what it has said since a few days after I submitted my app.
I'm going to have my Chicago Booth interview at 9am and my MIT Sloan one at 12:30 the same day. Crazy!