Bollenbach, Brad: Less is Less - User-focussed, test-driven, web-based, pragmatic, with a zeal to ship; former lead developer of Malone, official Ubuntu Linux bug tracker; driven toward beauty and simplicity. Montreal, Quebec, Canada. - http://www.30hourdays.com/blog/
Taryn East - Professional web application developer for 6 years. Sydney, Australia. - http://www.taryneast.com/
Krämer, Jens: jkraemer.net - Has published a Ruby gem and Rails plugin; works professionally with Rails. Dresden, Germany. - http://www.jkraemer.net/
Craig Ambrose: Agile Web Development - Freelance developer focused on dynamic web applications; experience with many languages and tools, prefers RoR as the means to best provide value for clients. Auckland, New Zealand. - http://www.craigambrose.com/