Like Angela, I'm a freshman at MIT, and I dropped in on this board ocassionally when I was a high school senior. So, now I'm back, but as a registered user to offer any help I can.
I'm originally from Northern California but currently a resident of the wonderfully crazy dorm East Campus. I have sophmore standing and declared 10-B (Chemical-biological engineering). Other stuff about me, I'm on the fencing team, and am part of Concourse (alternative freshman program). Applied early action, was deferred, and accepted later.
Feel free to ask me anything. I'll answer to the best of my abilities. If any of you guys want to contact my privately about stuff, my email's email@example.com
Also, Marilee Jones gave a talk during IAP on "The Mysteries of Admissions." It was a very interesting talk, and I'll post my notes/thoughts in a separate post.
Take care, and for all you seniors out there, don't stress too much and enjoy second semester.