jQuery Mobile This looks very interesting, along the same lines as jQTouch and Sencha touch but expanded to devices other than just iOS and Android powered units. This from the jQuery mobile site:
A unified user interface system across all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.
I look forward to playing with it. Provided it is actually “lightweight”.