RoR and client-side MVC

Hi. RoR does a great job with MVC pattern in the server-side, plus it´s integrated with great javascript libraries: scriptaculous and prototype, but these libraries are not mvc frwrks. (not that this is a problem)

It´s yet a relatively new topic, but I think client-side mvc frwrks are catching up. To name a few:

1. JavascriptMVC: http://javascriptmvc.com/ 2. SproutCore: http://www.sproutcore.com/ 3. TrimPath Junction: Google Code Archive - Long-term storage for Google Code Project Hosting. 4. Axiom Stack: http://www.axiomstack.com/ 5. Archetype : http://archetypejs.org/

And now comes the doubts:

1. Is it really a good idea to use mvc pattern in the client-side? 2. If so, mixing directory structure from some client-side frwrk with RoR will be very confusing 3. Maybe the best thing is wait until RoR integrate some of this frwrks?

I´d like to hear some personal opinions in this suject.