grooveshark.com is one of the first single page JavaScript apps running on the JavaScript MVC pattern. While their JavaScript codebase is not really a showcase of OO JavaScript, and loading their page takes 13 ajax requests (I was stressing out about 3 with my app) it's impressive to see that JavaScript MVC has finally made it to the main stream. So I guess JavaScript MVC is now an official pattern. Now let the battle of JavaScript MVC view engines begin. I am going to stick with jquery.tmpl.js for now.