A presentation on Introduction to Sencha Touch - developing web applications for mobile devices such as iPhone, Android, Blackberry. For a detailed tutorial series visit my blog : http://jbkflex.wordpress.com/2011/07/30/writing-your-first-sencha-touch-application-part1/
or search for Sencha Touch in blog. You will find a series of posts.
Clipping is a handy way to collect important slides you want to go back to later.