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Both our basic quality guidelines and many of our more specific articles (like those on links schemes or hidden text) have been reorganized and expanded...
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[edited by: Robert_Charlton at 10:10 am (utc) on Oct 3, 2012]
I would not have categorized "Multiple pages on your site with similar content designed to rank for specific queries like city or state names" as "doorway pages" either.
Doorway pages are typically large sets of poor-quality pages where each page is optimized for a specific keyword or phrase. In many cases, doorway pages are written to rank for a particular phrase and then funnel users to a single destination.
...as long as the pages are useful and don't just funnel you into a single destination.
Under "keyword stuffing" they give the example "Blocks of text listing cities and states a webpage is trying to rank for". Under "keyword stuffing" they give the example "Blocks of text listing cities and states a webpage is trying to rank for". Its very common to find local webpages in my area doing this for their service/delivery area. I see it for plumbers, contractors, firewood delivery and such.
I suspect that you've got to reach a long list before Google dings you for keyword stuffing, as such lists have been a common practice, originally intended for site visitors. Depends, I suppose, on whether the list is short enough to be easily readable.