The founders of Infegy have used their Social Radar, a social analytics and research platform, to take a look at brands in 2009. They call their report the Top 50 Social Brands of 2009—but I’m not convinced.
On their blog, Infegy says the Social Radar
analyze[d] millions of blog posts, news feeds, forums, social networks and Twitter posts to aggregate a list of the words and brands mentioned most frequently on the Web during all of 2008 and 2009. The list measures the number of unique individuals or sources that posted content about each brand during 2009 rather than the overall number of mentions, which would be more heavily influenced by big fans who post frequently about a specific brand.