The challenge of finding a book on applying social media to a learning environment (whether K-12 or business and industry) is the inherit nature for Web 2.0 applications to change. Over the last two or three years many Web 2.0 applications appeared, disappeared, merged, or changed without warning.
Jane Bozarth's "Social Media for Trainers" serves as a handbook for supplanting existing training or replacing traditional training with social media. The author examines Twitter, Facebook , blogs, wikis, and other tools (including but not limited to Google Docs, YouTube, social bookmarking, Skype, and SlideShare.)
As with any successful handbook for trainers, instructional designers and trainers "Social Media for Trainers" covers major aspects of implementing and managing social media in training. For each social media application, Jane Bozarth covers, from a training perspective, the major characteristics and the advantages and disadvantages of social each of these social media applications. Additionally, she provides a view of each application as a stand-alone or a supplement to existing training efforts. Best of all (and where other training handbooks sometimes fail) is that the author describes how to get started using social media tools. This is especially important since the design of social media tools does not specifically accommodate learning. Additionally, the author provides detailed case studies which include pre-work, in-class, intersession activities, and post-training event activities. Each of the case studies with a focus on the unique attributes of the specific social media.
I recommend "Social Media for Trainers" for trainers, instructional designers, and teachers involved with training and teaching at all levels.