This bundle was originally written by Ed Spencer for TextMate. I have converted it to be usable with Sublime Text 2, as well as adding additional functionality for Ext 4.0.
This bundle is released under the MIT license and can be used for both Ext JS and Sencha Touch.
Installation instructions for Sublimt Text 2
cd ~/Library/Application\ Support/Sublime\ Text\ 2/Packages && git clone git://github.com/rdougan/Sencha.sublime.git "Sencha"