Yehuda Katz is a member of the SproutCore, Ruby on Rails and jQuery Core Teams; during the daytime, he works as an architect at Strobe. Yehuda is the co-author of the best-selling "jQuery in Action", the upcoming "Rails 3 in Action", and is a contributor to "Ruby in Practice". He spends most of his time hacking on open source - his main projects, along with others, like Thor, Handlebars and Janus - or traveling the world doing evangelism work. He blogs at yehudakatz.com and can be found on Twitter as @wycats.
And I am huge fan of his open source contributions, they could be from server side or client side or any other library and I had wish to have a snap with this great contributor which I completed in RubyConf India 2011.