Proceedings of the Eighth International Conference on Weblogs and Social Media
A great collection of fifty-eight papers and thirty-one posters on weblogs and social media.
Not directly applicable to topic maps but social media messages are as confused, ambiguous, etc., as any area could be. Perhaps more so but there isn’t a reliable measure for semantic confusion that I am aware of to compare different media.
These papers may give you some insight into social media and useful ways for processing its messages.
I first saw this in a tweet by Ben Hachey.