MEMPHIS, Tenn., Aug. 8, 2012 /PRNewswire/ -- HigherVisibility, a Memphis-based SEO firm, was named in BestSEOCompanies.com's August 2012 list of the Top 50 SEO Agencies in the country. Ranked #3 out of the top 50, HigherVisibility is quickly outperforming and outranking many of the older,...