jQuery 1.3 has just been released. Based on the detailed release notes it appears that this version contains a lot of speed improvements for jQuery's already robust DOM selector as well as new features in the Event object.
While looking at the jQuery 1.3 post I also took the time to check out jQuery UI 1.6 RC4, which is really turning into what I would expect from the jQuery guys. When I reviewed jQuery UI in 2008 it was quite behind in terms of features, quality of widgets, and overall polish. Version 1.6 brings about more eye candy that is easy to use and quite well designed theme system that should prove very useful for my future projects.