I have a complete starter-project for Touch 2 using the MVC pattern on github here:
https://github.com/FrancisShanahan/SenchaTouch2MVCHelloworld
You can read my blog post about it here:
http://francisshanahan.com/index.php/2011/sencha-touch-2-0-mvc-in-5-minutes-or-less/
Hope this helps you get started,
-fs