So, for those of you who I haven't talked to, I should probably sum up my recent visit to Washington University. Long story short, I didn't get in.
I interviewed with three people based on my research interests, and those three interviews went very well. We talked about science and it was very interesting. The other person I interviewed with was less helpful. She was actually pretty unpleasant.
I don't want to go into a lot of detail here, but she seems to have formed her judgment of me before I walked in, and just looked for justification for her stance rather than trying to make a decision based on the visit itself. Oh well.
The rest of the visit was pretty fun. We went on a great tour or St. Louis, saw some very nice apartments that the grad students lived in, and ate some great food. All in all, if I somehow get accepted and they can promise me that I will never have to interact with that hostile professor, I would seriously consider going there.