purplebird, i talked to harvard yesterday. here's the deal: they have only 20 faculty members for EECS. so, very few students' goals actually match up with the faculty's research - that is, for those applications that qualify the initial reviews by the admission comm in the first place (and fair to say that if each faculty member is allowed to pick 2 new students, that's only 40 spots in all)..
that being said, they already sent out acceptances to students that they absolutely want. sounded like those were the phd admits. the rest of our applications are still being reviewed. but if you'd applied for phd and you wouldn't be happy with an acceptance to just the ms program, then you might want to call them and chat. it sounded to me that at this point they may only be deciding on ms admits - at least it seemed to be the case for my application.