I noticed that most of the modified servers just screw around with the vars, but quite a few of them have some pretty cool settings that I think would be fun to use on my own. So if you play with modified variables and you've come up with a configuration you really like, here is the place to share.
Here's my configurations: http://www.pastebucket.com/Code/Details/177
By the way, I head something about an Unreal Tournament server on Red Eclipse. I'm really interested in getting the script for that, if I can.