I know for General DM Advice you can try the following forum:http://www.treasuretables.org/forum/index.php
Its called Treasure Tables, and its a GM website devouted to being a GM.
Beyond that, I got nothing
But if you head over there tell em Clayton sent ya
I visit that website regularly. It's part of my small folder of DM-advice related websites.
Like I said, most of my DM knowledge is theoretical... I have no practical experience.
I think I'll register myself up for their forums though and send a request there.