Lucas Carlson founded AppFog, a PaaS company that leveraged Cloud Foundry and was acquired by CenturyLink. Lucas has been a professional developer for 20 years and specializes in Ruby on Rails development. Lucas has authored Programming for PaaS and the Ruby Cookbook and has written half a dozen libraries in various programming languages and contributed to many others, including Rails and RedCloth.
Leonard Richardson (http://www.crummy.com/) is the author of the Ruby Cookbook (O'Reilly) and of several open source libraries, including Beautiful Soup. A California native, he currently lives in New York.