PhoneGap is an HTML5 app platform that allows you to author native applications with web technologies and get access to APIs and app stores.
As of this post, Kendo Mobile UI is not avaialbe to download from the website. They do however have a working demo. So.. You interested in a pre release version of the Kendo Mobile UI..
Download the ZIP, unzip it and open the source in Eclipse (Obviously you need the Eclipse, Android SDK and the ADT Plugin installed and an Android Device (preferred) or Virtual Device)
This is not a leaked code, i just reverse engineered in from the the demo they have running, downloaded some resources, tweaked the HTML to the standards used in jQuery mobile oddly enough.. it does not run properly locally but it actually works on an Android Device, and it is smoother than jQuery UI by a massive distance.
Very impressive, and if you want to tinker around more trying to get it to work, its a nice jump start before the beta gets released.
The ZIP contains the officail WEB JS/CSS and on top of it i put the ripped JS/CSS and other resources, and is based on the PhoneGap example. Dont rofget to reference the phongap source jar in the res folder.