If you do a search of BoA short sales, you're going to get a bunch of very frustrated and angry links. For a while, they improved and Equator was fairly efficient, but that seemed to go away.
A new BPO is a sign that someone is at least looking at it. They need to be reviewed and updated from time to time as the market changes. I'd love to tell you an answer is imminent, but I have no way of knowing that. It may be and it could be a while longer.
Ideally, a short sale has experienced agents at both ends, a skilled, knowledgeable negotiator working with the banks and cooperative sellers.
I wrote a blog called, The Anatomy of a Short Sale, to help explain all the working parts. I've attached a link for you below.