So yeah. Lately I've been trying to get better at kismet since it's something that will greatly help any unreal-artist kick out awesome levels and it turns out you can do a whole bunch of wonderfull things in there related to game art aswell.
I can only do the most basic things (game designers do the fancy crazy stuff :)) like trigger effects, move/animate stuff, elevators and such but I'm learning.
Here's one simple thing I did the other day. A door that opens when you walk down the hallway. Nothing fancy. For those wanting to know more about Kismet I can recommend these two pages.