Dave Gray, SVP Strategy, Dachis Group, is an author and management consultant who works with the world's leading companies to develop and execute winning strategies. His previous book, Gamestorming (O'Reilly), has sold more than 50,000 copies and has been translated into 14 languages.

Thomas Vander Wal has been working with folksonomies since their darkest origins, and is credited with inventing the terms 'folksonomy'and 'infocloud'. He talks and writes about folksonomies more or less continuously. Thomas is also on the Steering Committee of the Web Standards Project and helped found the Information Architecture Institute. He lives in Bethesda, Maryland.