Labour Market for Social Media Research

My dear blog readers, I am working on a project at the moment and I wonder if any of you can recommend articles that specifically address the labour market for social media, trends in employability, or skills that someone who is applying for a "social media coordinator" position would necessarily need to have. I have read the US Bureau of Labor paper with their projections but most of the numbers are tied into PR as a position which requires social media, and not necessarily a social media position on to itself.  The data seems to be scarce, understandably because it is a rather "new" position, however I know that social media users are a savvy bunch who would not let the opportunity to study something like this slip away, especially if they also are academics!

Please leave all suggestions in the comments.