I had lunch today with my friend and colleague Peter Gloor. Peter is a leading figure in the study of Collaborative Knowledge Networks, and I can't say enough good things about him personally and professionally.
Peter is working on a fascinating book, Social Patterns of Innovation (formerly COINS @ Tipping Point). In the book, Peter surveys great collaborative innovations of history and uses them to illustrate the fundamental principles of collaboration and innovation that are even more true today. You can read and comment on a draft of it now -- Peter aims to practice what he preaches in developing an effective tool to promote collaborative innovation.