Are Online Yellow Pages Performing well?

Part of my job consulting with small and medium sized business about online advertising programs, looking at the big picture of the online marketing program is always something we talk about.  I have always been a very big advocate of being listed as many places an you can (yelp.com, Dexknows.com, superpages.com, yellowpages.com, google places, yahoo local, etc). Google Trends combined …