Phew. Just had my interview. I think it went relatively well, even if there were some awkward moments, especially at the end.
I did my interview with an alumnus where I live, and it lasted about 45 minutes.
He started off with a review of my resume and it turned into a relatively informal discussion/interview from there. He asked me specifically about my leadership experience, teamwork experience, problem solving experience, and analytical experience (requesting actual examples from work... I am not sure if I handled these questions as well as I could have though). Of course, he asked why MBA and why the Johnson School. He asked what other schools I applied to any why. He also asked for "three things about myself" that he should include in the write-up (I probed a little and asked if he meant professionally, personally, etc. and he said anything would work). He did not ask about what clubs I would be interested in at Cornell, and did not talk at all about my current non-work activities.
Now it's just a waiting game until December 17th I guess. Fingers crossed!
Good luck to anyone else who still has to interview.