According to the article:
http://poddymouth.wordpress.com/2008/04/06/scamazon-2008-part-5/
…POD authors will no longer be able to sell through Amazon unless they go through Amazon's in-house POD publisher, BookSurge. I wasn't clear, though, whether this affects those who participate in Amazon's Advantage program…
thanks for any insight
From what I've read, it doesn't matter. Contact them to make sure. Too many "what ifs" and conjecture currently going on in blogs and articles.