OSDir has screenshots of the Kubuntu 5.10 preview release.
On a somewhat related note, I installed Ubuntu 5.10 preview and am thoroughly impressed. The one thing that has shocked me is the “Add Programs” application. In Ubuntu 5.04 Add Programs is not very useful, it has the names of some 20 extra programs not included by default. But now, it’s got hundreds, if not thousands, of apps. They’re all organized, with their own icons, and summaries of what everything does. I’m not sure how to describe it, the experience is something like viewing software boxes at a computer store, except everything is instantly, legally, and freely downloadable. This app should be in every distro and on every window manager. It’s going to have a huge impact on the acceptance of Linux as soon as people discover it.