The Art of Profitability Not Web 2.0, but my favorite business book
Collaboration 2.0: Technology and Best Practices for Successful Collaboration in a Web 2.0 World
Marketing to the Social Web: How Digital Customer Communities Build Your Business
Smart Start-Ups: How Entrepreneurs and Corporations Can Profit by Starting Online Communities
The Long Tail: Why the Future of Business is Selling Less of More
The Book of Agreement: 10 Essential Elements for Getting the Results You Want The key to collaboration online and off