To the posters who inquired about MIT, I concur entirely with IRHopeful's earlier message. I was 0-for-4 in this funny lottery game until I got the call with good news from MIT's department the other day (five-year funding package--very exciting). I had strong numbers (PM if you really want to know), terrific rec letters, etc., but I had no luck with the other schools (though I am still waiting to hear back from a few) . . . Basically, I think, it all comes down to departmental fit, and whether professors feel they can accommodate your research interests.
This was particularly vindicating because I was rejected there--and everywhere else, in fact--four years ago (a humbling 0-for-7). So for those of you who are feeling down about this year's cycle, keep the faith and never give up. I spent those four interim years earning a relevant Masters degree, publishing extensively, and developing a solid expertise in my subject area. I recognize it's a rather circuitous route, and not for everyone, but it has certainly paid off, and I couldn't be happier with the outcome.
By the way, I believe MIT accepted ~30 people this year, and they have called all those to whom they were offering the full funding package (largely to get a sense of whether or not they would attend). From what my advisor/contact told me, they are already getting a much higher yield than last year, when 9 people accepted their offer.