A new version of jQuery has quietly been released over the weekend. It’s only a minor point release but has a couple of features which look amazing: some selector functions now work up to 8x faster than the previous release; and there is support — very clever support — for HTML5 data attributes. Take a look at the jQuery 1.4.3 release notes for more.
Also released was the first alpha of jQuery Mobile, a touch-optimised amalgam of jQuery and jQuery UI. It’s actually a little buggy on my Galaxy S Android phone, but as it’s an alpha release that’s perfectly forgiveable. It looks pretty smart and comprehensive.