Local Search's that feed into local search.

Which local search data feeds to others?

[thinktanker]

I'm in the process of updating local search info for a business and I am trying to find out where yahoo, google, bing, citysearch get there info. It looks like to me that google pulls from dexknows and superpages but who is the source for yahoo and bing etc. Is there some flow chart out there that shows which local search engines pull from what souces?

Also I have noticed that citysearch and superpages allows some business to get listed in a geo graphic area like a range of counties (which would be helpful for my business that delivers to a wide range of counties). Anyone out there know how to get a range of locations listed on citysearch or superpages? This is also valuble b/c google pulling from superpages will give me multiple local listings in delivery areas without having a physical location.

Thanks!