Marshall - 1:07 am on Jan 5, 2013 (gmt 0)
You might find this thread useful, or at least interesting Is Amazon eating your lunch? [webmasterworld.com] as well as this article from the WSJ Competing With Amazon on Amazon [online.wsj.com]
I also read an article in an e-trade monthly, Internet Retailer I believe, that Amazon nets $5.95 per $1,000.00 in sales undercutting even Walmart. Rather difficult to compete with that.