Have you seen this? http://www.hbs.edu/mba/admissions/blog.html
FROM THE HBS ADMISSIONS BLOG:
Round One Interview Invitations
Date: October 14, 2010
Just so you know, I always wonder whether my comments here alleviate or create anxiety. This update may sound quite stern and rather chilly. That's not how I mean it, but I want to be very (very) clear.
We will begin to send out interview invitations by email tomorrow, October 15. The invitation will provide detailed instructions about the sign-up process.
Please note: We will continue to send out invitations until November 3. Really. And not just a few - we plan to interview about 800 people in Round 1, and we will send out interview invitations on a rolling basis as applications are reviewed. We will continue to add slots in many locations as we send out more interviews, and there is ALWAYS the option to come to campus.
If you call and ask us if we can expedite the consideration of your application so that you can make travel plans, the answer will be "Sorry, no."
Another important note: Please don't send in additional materials or have others do so on your behalf. Even if we thought that was fair, we can't be adding things to files at this point.