Hi guys, currently checking out EmberJS as a client-side MVC. I would highly recommend it as it is open-sourced and powered by the community. Not to mention, one of its creator is Yehuda Katz, the core-developer for jQuery and Ruby-on-Rails.

Not to mention, integrating EmberJS to an existing server-side framework is sweet as well. Take for instance for Ruby on Rails, all that is required is having the following line included in the Gemfile of Rails: