A couple more:

http://www.google.com/search?q=wisegeek.com

http://www.google.com/search?q=bizrate.com

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My reasons for suggesting that these are blocked:

"What are Some Animals Commonly Mistaken for Dinosaurs?" (http://www.wisegeek.com/what-are-some-animals-commonly-mista...)

"How Do I Care for a Rose Breasted Cockatoo?" (http://www.wisegeek.com/how-do-i-care-for-a-rose-breasted-co...)

"Why Does Alaska Have Really Long Days During Some Times of the Year and Really Short Days During Other Times?" (http://www.wisegeek.com/why-does-alaska-have-really-long-day...)

- should be fairly self explanatory. Plus it only took be ~45 seconds to find these examples of journalistic <sarcasm>brilliance</sarcasm> (there's MANY more such examples). Plus they are - IMO - breaking AdSense guidelines since the Google link unit ads are EXACTLY the same (in color/style and :hover behaviour) as the in-content navigation links, which is a direct breach of AdSense policy. You'd think the AdSense team would be aware of such a big violation..

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And as for BizRate, it's a 99% autogenerated site with little (if any) unique content. Plus most pages have at least one keyword stuffing area (such as http://www.bizrate.com/mens-shoes/dress-shoes/ - see the 'related searches' bit on the left, for a quick example).