Yeah wash u! I'm already in town, because I did my undergrad there, and I'm getting excited about starting up again in the fall. As far as apartments go, DO NOT rent from Reserve at Forest Park...they own a lot of the apartments in the Skinker/Debaliviere area, and although they are quite affordable and look nice at first, they fall apart quickly and the landlords never fix ANYTHING. I've been in my new place at The Chesterfield , which is at the corner of Union and Waterman, for a month and a half now and I love it. I have a "studio" but it has a bedroom and goes for $550/month. Their full one-bedrooms have a full dinning room and a den as well as the bedroom, so there's tons of room, and I think those start at $600/mo. The one thing about the building is that almost everyone owns a dog (I have two myself) so if canines aren't your friends you would hate it.
As for a yahoo group, I'm skeptical--I tried setting one up a couple months ago and before I even got the chance to spred the word on LSD the group was getting spammed like crazy, so its probably not worth it...if we could find some other site to set up a listserve and get to know eachother I would definitely sign up, though.