As a side note, I just read the Google War Report, which is about Google's war on affiliate marketing sites. The author makes some good points and may be correct that Google actually labels ALL affiliate marketing sites as thin content sites. I've seen several affiliate sites with 100% unique and high quality content on each page, with 400+ words on each page, disappear from Google search results. I also saw an online store that did rank well disappear from Google search results with no Panda or Penguin issues. The only identifiable issue with the site is that the owner added affiliate links to Amazon on the formerly high ranking product pages for products that were discontinued. That appears to have been enough to drop the rankings for the entire site.
The Google War Report is a subtle pitch for the author's Elf Links WordPress plugin. You can download the report on the author's demo site, plus you can see what the plugin does on that page.
Elf Links Demo
Google is up to much more than what they are telling us. We ain't in Kansas anymore, Toto.
DuckDuckGo looks pretty good. I can see that they do not regionalize the search results.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin