I saw a demo of Adobe Configurator today in the "Deep Dive of Photoshop CS4" session and was floored:
http://labs.adobe.com/technologies/configurator/

Per Adobe Labs:
"Configurator is an open source utility that enables the easy creation of panels (palettes) for use in Adobe Photoshop® CS4. Specifically, Configurator makes it easy to drag and drop tools, menu items, scripts, actions, and other objects into a panel design, then export the results for use inside Photoshop. These panels leverage the support for Adobe Flash® built into Photoshop, making it possible to drag and drop audio, video, images, and even other SWF files into a panel design."

...

It's a great way to create your own CUSTOM PHOTOSHOP PANELS within PS CS4. I've been wanting to get more familiar with Photoshop again - and by reigning in only the elements I use on a regular basis and putting them in my own custom panels, it will help me feel more comfortable within the tool which - let's face it - has a pretty daunting UI.

If you guys try it, let me know how it works for you!

Kevin