Let me explain what I know to give a bit more credibility. Last year I was put on the middle tier WL at UConn. Like a lot of people here I was really upset about it and did whatever I could to try to move my position up. I sent update letters, letters of intent but when I called to see if there was any way I could move up on the WL, the person I spoke to said that it was static, even within the middle tier list. It was later confirmed by my adviser that I had a specific position on the WL and that there was nothing I could do but hope a lot of people dropped out.
Good news is I am not part of the new incoming class, so if you do not get in next year there is always next year. To be completely honest I was very upset and felt like pretty much like a failure when I did not get accepted the first time through. However, I pulled myself together, applied super early (June) and got accepted to numerous places this time around. If you found that you did not get a lot of interviews/were wait listed everywhere make sure you do whatever you can to improve your application and apply really early. Trust me, it makes the difference.
Best of luck and just realize it is really hard to get in, but so worth it when it finally happens.