Programming Collective Intelligence: Building Smart Web 2.0 Applications By Tob

Microformats: Empowering Your Markup for Web 2.0 By John Allsopp

Web 2.0 Heroes by Bradley L. Jones (Hardcover, 2008)

Web 2.0 (Shortcuts) by Han, Sam

Producing for Web 2.0: A student guide (Mediaskills) by Whittaker, Jason

Managing the Crowd: Rethinking Records Management for the Web 2.0 World by Stev

Web 2. 0: a Strategy Guide by Amy Shuen

Pro jQuery 2.0 (Expert's Voice in Web Development) By Adam Freeman