As you may know already, RC2 for version 1.8 of jQuery UI for jQuery 1.4 is out, heralding the final release of jQuery UI 1.8 “in the next few days” based on the What’s New post. You can link through directly from http://jquery.com/ or http://jqueryui.com/ — or get the deep-link download here.
But you knew that already! 🙂