Sébastien (and others) over at blogus.xilinus.com have been working on a Prototype Window Class that does a nice job of utilizing CSS and javascript (working with script.aculo.us assets) to create window magic. I could definitely see a lot more being done with this in our catalog environment. Be sure to check out the samples.

However, there does seem to be some debate over at the Ajaxian.com comments as to its implementation and true nature.

Thanks again Ajaxian.com. You guys keep finding the stuff that rawks.