More interesting are the directories for individual topics - for example:

http://lanyrd.com/speakers/startups/

http://lanyrd.com/speakers/user-experience/

http://lanyrd.com/speakers/scala/

http://lanyrd.com/speakers/python/

http://lanyrd.com/speakers/ruby/

http://lanyrd.com/speakers/ruby-on-rails/

http://lanyrd.com/speakers/scaling/

http://lanyrd.com/speakers/nodejs/