As I continue to try to keep my systems up to date with the new features of jQuery 1.2.3, the jQuery team is hard at work releasing jQuery 1.5 beta. Looks like there is quite a bit more support for the sortables, drag and drop, and my particular favorite the slider. I hope to have some time to tinker with the slider because those can make a UI feel nice, or feel clunky depending on how the code turns out.
They mention a large performance boost as well, I know we got a nice boost on one of the previous iterations.
Now if only my jQuery reference widget could keep up with releases: http://blog.medallia.com/2007/05/jquery_reference_widget.html