Who did you speak to at Berkeley? When I called the admissions office after receiving my wait-list letter, I spoke to the receptionist who answered the phone. She told me the list is not ranked, but rather divided based on the applicant's concentration (i.e. Health, Mental Health, Gerontology, etc.). I've never heard anything about the list being ranked alphabetically. If that's the case, my last name starts with R, so I'm probably screwed. :x
I then contacted an acquaintance who graduated from the program last year. He suggested I contact the head of my chosen concentration (in my case, Health). The Health concentration director sent me a very nice e-mail saying he didn't know all the specifics of the wait-list process, but he referred me to someone in admissions who could "explain our protocol to you, and we follow it strictly so as to be fair and equitable to all candidates." I'm still waiting to hear back from the admissions contact. I seriously doubt strict protocol equals an alphabetical wait-list, but who knows.
Best of luck to you, too! Let's keep each other posted.