I posted this a while back, but now that we have a special forum and the product is final - here is the link again (hope you don't mind).
I created this site in literally one evening using a few of the ExtJS Core ux site controls.
Note: This is a hobby site created just for fun, all of the code (minus controls) is right there in view source.
This uses JSON and Templates as well as a variation on the tabs implementation. It also loads the content into tabs lazily and retains the content. The photo gallery is all ajax / json and templates (really simple as you can see from the source).
I hope to have a much better demo site .. specifically for the ux controls and maybe a "schools" db where you can "try it".
Any ideas / input is welcome.