I'm also nervous to hear back from MIT. And I really think MIT needs to do a better job in replying to prospective students. When I applied to themI had trouble with getting official transcripts at the beginning, so I sent out an unofficial transcript to their grad program coordinator and explained the situation, yet received no reply. One week later I mailed out the official ones and emailed the coordinator again, still no reply. Two weeks later I emailed AGAIN asking if they've got my transcripts. And of course, still no reply!