MochiKit sneak preview
If you're into edges and bleeding, check out: http://svn.red-bean.com/mochikit/trunk
If you want to see more of MochiKit in action, check out its sugar daddy: MochiBot. MochiBot is a tricked out traffic monitoring system for Flash content (that really shines if you're doing a viral campaign or want to watch your game spread over the internet). If you're a Flash developer, you ought to find MochiBot pretty damn cool, and this is just the beginning of many services we're working on at Mochi Media. It's still beta, but it's free. Free is good.
All of the tables in the MochiBot UI are sortable (when that makes sense) and are loaded on the fly by XMLHttpRequest. This makes the interface just about as responsive as it gets for a browser, and you can refresh the data in a fraction of a second if you just can't wait to see how your Flash content is doing. There's even some cute little sparklines on the dashboard!