This post is also in the WoW forum, but I figured I'd also post it here, for the general non-WoW MMO-goer. Props to TO for the original post, also added a little more which seems obvious but might not be to some people. New and improved with perfect spelling!
-General Discussion of Private Servers is allowed
-No advertising or offering support for private servers
-Links can NOT be offered to any private server
-You may not ask for links to private servers