When the Unreal Development Kit was released, a series of posts on the Epic Games forums referenced my UT3 tutorial guide, and traffic promptly spiked by about 400% for 4 days. (It's now sustained at about 200% of previous levels, which had been approximately constant for a few months.) I have a powerful server so the traffic spike didn't strain anything, but the renewed community attention towards Unreal Engine design has reminded me that I'm short on time to update the tutorial guide, and there are a number of really good new tutorials out there (including ones specifically applicable to UDK). I've put a list of those at the top of the guide until I get a chance to integrate them, but if you've got some time and you'd like to help out, please contact me.