Here's one I found from trying out a few Unreal Tournament commands
~
SWITCHLEVEL <mapname>
We use it a lot to change/restart maps in the Bactaweek tournament
http://www.eclipticalrealms.com/warg....asp?gameid=13 to make sure clan members have not gone on shopping trips for the heavy weapons.
This command was really important for us so I'm glad this one didn't go through the mincing machine.