Traffic Rank for amazon.com: 29... Looks like they are doing fine. They are not getting hit from dup content. just as bizrate and shopzilla are doing fine.
I use to see their analytics daily and i can assure you that their
seo is on track, it is just hard to bleed
PR to over 150k pages of content for
seo purposes. That takes a steady link building campaign, and a massive one at that.