No. I haven't heard anything about my status on the alternate list at USC. I got off the wait list at Cal State LA though. My acceptance letter from them came a couple days after I gave a deposit to NYU. Are you planning on calling them? Did you contact them when you found out you were on the alternate list?
I have been waitlisted for one MSW program and put on an alternate list for another. Are these the same thing and how good are my chances of actually being accepted?