For those who are waiting for Harvard and U Penn, here is some information.
I emailed Harvard in mid Feb and they told me that "Decisions should be announced at some point in March."
I emailed U Penn around the same time and they told me "Decisions for admissions should be made over the course of the next few weeks, and the department will be letting candidates know where they stand around mid-March."
It is disappointing that they are really just taking their sweet time, but it is a part of the process I guess. Good luck to all of you still waiting for offers.