I suspect the slow response was mainly due to two things:
1) Gold hasn't been out long enough for people to set up sites specifically for it; AFAIK all the sites recommended so far were supporting SE IV before Gold was even announced.
2) The people who run the best sites are too modest to plug them themselves.
A good site for managing multiplayer games is
http://seiv.pbw.cc
PBW is already set up for Gold, and in the process of setting up support for Gold mods.