Do you maintain a professional Twitter account?

As professionals, both military and civilian, are looking for additional ways to network, share ideas and resources, build their reputation as a thought-leader, and demonstrate their savviness with emerging technology, I see more and more individuals taking to forms of social media like Twitter and G+ to establish professional accounts.  I think this is especially a way to delineate oneself in the thought-leader and influencer department as sites like LinkedIn and RallyPoint become more "baseline" for all professionals.  In other words, people practically expect everybody to, for example, have a LinkedIn profile these days so having additional channels of professional presence is a way to differentiate from the crowd.