The new 2010 Horizon Report has a focus on K-12 education. It should be no surprise to you that it covers collaboration in some detail. For example, this comes from near the beginning of the book in the trends section:
Technology continues to profoundly affect the way we work, collaborate, communicate, and succeed. Information technologies impact how people work, play, learn, socialize, and collaborate.
Thanks goes to Buffy Hamilton for noting.