Well, kinda. Chris S. sends along word of a legal version of the next incarnation of UnrealEd. See, those French folks working on the Unreal Warfare-powered XIII game are holding a map design contest, so they've released a version of the new editor for people to map with. Here's the English translation of the site for you to check out, along with a link to the editor itself (38MB).
While this version seems to have terrain, prefab, and Karma stuff, I'm not exactly an Unreal editing guru (and I'm dumb) so I'm not sure how old this version is or how the build shipping with UT2003 will differ from this one. Still, if you're a level design fiend with a GeForce2 or better, you may want to give this a try. I saw this at planetunreal.com