When I was accepted it told me on the status page. Some students in my class got phone calls, others got the message on the status page. A few weeks to months after you hear from the status page/phone call, you get an official letter stating your acceptance.
All waitlists and rejections are sent via snail mail initially. It will eventually show on your status page but it may take a bit.
By the way...do not let the length of time since your interview discourage you. They have their meetings on Friday afternoon (I have seen them do it). If your interviewer is unable to make it to the meeting, they table your name until they can make it. As you can imagine, doctors are very busy. It may take them several weeks until they can make it out to one of the committee meetings.
