I haven't been on SDN in a while, so I dunno if this has already come up, but please be courteous to your student hosts. Now that I'm hosting students, I can say that although for the most part it's an enjoyable experience, it is taxing to have someone over and have to rearrange your schedule, etc. to accommodate an applicant. I know it's stressful for you applicants as well- I remember being there last year, and I don't think I appreciated my hosts enough. So if you need to stay more than one night, it's best to ask for 2 different hosts. Weekends are especially tough to have people over for 2 nights. And a thank you note, a little gift, or paying for a meal can go a long way. I'm sure most of you are courteous hostees, but I recently had a bad experience with an applicant who didn't tell me until the day before she came that she was staying for 2 nights. I emailed the host program head about it, and she forwarded my email to the dean of admissions. So basically, I wouldn't be surprised if the applicant doesn't get in because of this. I'm sure in the vast majority of cases, staying with a host has no effect on admissions, but I wanted to let you know that it can. So again, don't take your hosts for granted!