"Social media is changing the workings of our museums. Our hierarchical structure has historically disseminated information from our experts to our visitors. The envisioned twenty-first century model, however, is more level. Instead of a one-way presentation, online visitors are often interested in having a conversation with our curators and content providers. And many of us are joining our traditional experts in representing our institutions in these conversations. In response, new media specialists have been looking for ways to engage our public by designing and using applications that...