The Google TV jQuery UI Library provides keyboard navigation, custom controls, and ready-to-use pages.
Take a look at the Google TV jQuery UI Library Reference and read a brief Google TV jQuery UI Library Controls Tutorial to get a quick start on working with the library controls. If you're interested in keyboard navigation, read this detailed article on Google TV jQuery UI Keyboard Navigation.
Take a look at the Google TV Closure UI Library Reference. You might want to read a code walkthrough to introduce you to using the library. Or you can learn about how to extend the library with a custom component.
Get the Code
The library code can be found at: http://code.google.com/p/gtv-ui-lib