Hello my friend, thaks for the information. As many of us said here, the ammount of knowledge available on the legacy UDK Forum is for sure HUGE, as it cummulates years of postings, on a time when Unreal Engine 3 was (and for most of us still is) the top notch game development solution.
This knowledge is to be preserved, and I myself can host the site if it represents a burden for EPIC Games, as we still love UDK, and many of us, mainly myself, will still keep using UDK to develop our games for a long time 
Cheers!!!