Sencha Con User Conference – Learn about their cross platform developer tools

I came across this video of the opening session from the SenchaCon user conference held back in November. Looks like an exciting development tool that will allow developers to build mobile apps cross platform utilizing HTML5. They plan on releasing more videos form the conference here and announced a free to use version of Sencha Touch 1.0. This is their HTML5 mobile JavaScript framework that allows developers to create mobile web apps for the iPhone and Android touchscreen devices. I’d like to know if anyone has had experience using this development tool.

SenchaCon 2010: Welcome and Keynote Address from Sencha on Vimeo.