Thanks everyone. Philadelphegan I think that's my conclusion too. I still have 2.5 months until I have to move, so hopefully something affordable in those 2 sections will come up. Are you looking in the same areas?
Good timing! Turnover in the area is particularly high, as it seems that most of the renters are Penn/Drexel grad students. Penn's Spring term ends mid-May and Drexel's Spring quarter ends in early-June. I'm probably going to stay where I am - which is actually in the area at 23rd and Locust - because my place is tolerable, cheap-enough, and I'll almost certainly move next Summer or soon thereafter.
Also, where is your avatar!
I was wondering that, too! This is perfect though - something else to do to procrastinate getting back to work.