Saw over at Billy's Voodoo Extreme that he yanked a message off of Unreal Universe which says this:

This is more of a demo than a test. It based on a release candidate version of UT. But we will be looking for bug reports and compatibility problems. This is one of the final steps on the road to finishing and releasing Unreal Tournament. We'll certainly see what the users report and that will give us a clear picture of how far we are from release.