I'm sorry, I don't know anything about how the list is moving. I do know that I turned down an acceptance from Penn State last week, so there is at least a tiny bit of movement. 🙂
If you haven't already, I would call the office and ask if they have any information about the waitlist status. That provided some pretty helpful info for me. Also, I would write a letter of intent, since it sounds like you would definitely go if accepted. Make sure they know how much you want them! And keep them posted on things you are doing--research, volunteering, etc.
I hope some of that is helpful. Anyway, good luck! Penn State is a great school, with awesome people--I'm keeping my fingers crossed for you.