After having spent quite a lot of time to find a clean way to export UnrealTournament sequences to a movie, we have finally found MovieUnreal:
MovieUnreal
MovieUnreal++
Movie instructions

There's also an UnrealMovieStudio to have full control over cameras, characters, lip-sync, trigger any event, etc:
UnrealStudio

And we also came across a video showing the new physics engine of Unreal 2004... You must see it to believe!
UnrealEngine [zipped divx 11Mb]

Pierrot & Gabriel