I worked for Bank of America Home Loans in WA, until I switched to a Joint Venture between Bank of America and a Local RE company. What I can tell you is that they are building their retail lending model from the old Countrywide model; they purchased CW in July 2008 and have recently completed customer day 1 for this merger.
This is a big corporation that is well run and highly considerate of your productivity as well as process stability. They apply Six Sigma methodology to most of their business processes and require a great deal of activity tracking. The upsides in my view to working for the organization are the brand and the fact that they work to drive business to you.
I don't know what to tell you about Amerisave, but I enjoy originating here.
Best to you,
FB