Also something to mention, the actual UDK download contains a sort of "new demo" for UT3. Four levels, three weapons, four vehicles and one robot character. Its supposed to look even better than the actual UT3 game since this engine has been updated with new lighting and such that was never added to UT3 itself. Plus it gives a starting point for people to mod the engine, so thats nice.
I would love to see The Haunted become a standalone game with this. That mod is fun as hell.