Compared to 2009–2010, the usage of blogs, online video in social media, message/bulletin boards, podcasting and Myspace were all down. There was also a 50% decrease from 2010 in Inc. 500 companies who said they used no social media marketing tools.

Social Media Tools Currently Used by Inc. 500 Companies, 2009-2011 (% of respondents)

via Correlating Social Media Success with Marketer Usage – eMarketer.