Hi, I too am waitlisted at a couple schools and accepted at others, so I know how you feel. I will say that I think every school is different when it comes to taking people off their wait lists. It depends on how many people reject the offer of a seat in the class of each school. Say School A is very competative and lots of people want to go there, you would expect that most of the acceptances they send out will NOT be rejected. That school will therefor take very few people off it's waiting list. But then say School B is a less respected school and gets a rejection for every two acceptances it sends out. That school may go through half of their list to fill a class. The point is, we have no way of knowing where a specific school stands on this scale. So my plan is to just wait it out (ha ha) and let fate decide!
As far as unranked lists, I wasn't aware there was such a thing. All the schools I interviewed at made it clear that each student recieves a score used to rank them. Also, I went to undergrad in Indiana, and while it's not as warm as So Cal, it's not as bad as you might think. IU is a good school, and the bars in Broadripple are not very far away incase you feel the urge to let loose! Good Luck, Mango