I'll be there 10/28.
They offer one night's free stay in Olin Hall, the big residence hall on campus. They also said there's an option of staying with a med student off-campus, but it's not guaranteed that somebody will be available when you'll be there, so it's a bit more difficult to arrange (at least that's the impression I got.)
I'm also staying at Olin. They seem pretty on top of accomodations and events for applicants--they also said there's a pizza party and a student hosting program for people who stay at the hall and not with a student--I'm impressed at the level of effort they put out, compared to some other schools.
And I emailed the reply form and heard back the next day. Good luck to you all!