I was called relatively late -- between 8 and 9 EST. Judging from whogotin, it seems at least a few others were called around that time. I couldn't tell you anything about a waitlist or whether there are more offers to be made.
I forgot WashU's deadline was later than a lot other programs. They'll probably start sending out official acceptances in a few weeks. So what are your interests? Mine are pretty broad - probably mind first and foremost, followed closely by language, logic, and metaphysics.