Yea, Xubuntu and not Ubuntu – Xubuntu is Ubuntu using Xfce.
Distroreviews.com have had a look at the lightweight version of Ubuntu – Xubuntu – read it here.
I love Xfce. It's fast, easy to configure and looks great. What could be better.. I'm runnnig a top-notch Linux distro with a no-bloat window manager? Xubuntu is sure to turn many heads as the news of this slick configuration continues to spread. Once again, nice work Ubuntu community!
You'll also find a screenshot tour at OSDir.