George, do you have any domains with your whois/registrar information matching your Amazon account information? I guessed that was the vector they used to attack me. I had several domains with my home address as my address, along with my email and name. Voila. The entire triangle of data the CSRs need.
I was able to get a CSR to show me some of the logs of the chats with the scammer, which was particularly enlightening:
http://www.htmlist.com/rants/two-for-one-amazon-coms-sociall... (Thanks also for linking to my post in your article. It's insane this is still going on.)