Two fellow classmates of mine, Greg Canada and Sean Moallem at The Art Institute of Orange County have produced a cool tribute to Day of Defeat's Avalanche created with UDK, thought you guys should check them out and hopefully drop them both an e-mail inspiring to do more awesome work!
Greg Canada's Portfolio
Sean Moallem's Portfolio
My intro to Greg Canada and Sean Moallem:
Here is a video of their project Operation: Avalanche, a Day of Defeat tribute done in UDK.