Linda, that was a great post! I'll see if we can find a way to get your document posted on the website somewhere.
I have one other suggestion (which I think someone already mentioned but I want to re-itterate). Have LOTS of questions for the interviewer. I had interviewers who only wanted me to ask questions. You need to have some ready - write them down if you need to. I'd suggest having 8-10 questions ready, and don't be afraid to use the same ones on multiple interviewers. Ask about the students, life on campus, specific aspects of their program, etc.
Also, go over your own application and secondary the night before. Make sure YOU know what's on there and that you can talk about any aspect of it.
Finally, if something goes horribly wrong at your interview (which it shouldn't, but if it does), then tell someone right away and they can arrange a new interview for you before you leave. I have heard some real horror stories, but 99% of the time, I think things go pretty smoothly.
Actually one of the things I liked most about Loyola (Stritch SOM) was that they had two interviews set up ahead of time. Those interviewers "scored" you right away and someone in the admissions office was there to receive the scores (even on a Saturday!). If there was a large discrepancy between the two "scores," the admissions office would set up a third interview right then and there.
They explained why by stating that since there were occasions where some people didn't "click," they didn't want to eliminate anyone based on one clash of personalities. Pretty cool I thought...
P.S. Sethina & I have emailed each other and I've sent her the (not too much) longer version of my little interview talk. Don't know where it will be posted, but it should show up somewhere soon. Glad y'all liked it.