Have you seen the new themes? Are you wanting to try Lucid Lynx just a little without much hassle? Now you can. The Ubuntu Geek has a quick how to that explains how to install the Lucid Lynx themes and give your current Ubuntu install a facelift. He has instructions for versions 8.04 through the now current 9.10. Go ahead and install your favorite and it will seem like a whole new system. At least in the way it looks. As for me, I think the newer themes are going to draw on more graphic power than my tired laptop will take. I may want to hold out for the Xfce version when it arrives.
How to Install Ubuntu Lucid Proposed Community Themes In Karmic/Jaunty/Intrepid