Don't count the WotLK Wiki out yet -- after going down late last week due to a suspected cease-and-desist order from Blizzard's lawyers (now confirmed), they have returned with a completely different host and all the information from the leaked Alpha they were originally hosting. They say that their original wiki hosts, Wikidot, were extremely supportive on both the traffic and legal fronts, as they upgraded their servers just to keep the site up, and originally did help with legal troubles. When Vivendi Universal took legal action against their ISP, however, Wikidot had to fold, and the wiki has now moved hosts to wotlkwiki.info.
Last week, there was also mention that the C&D didn't ask them to remove all information, only "over-the-line" info, such as screenshots or video. But apparently that clause doesn't apply to the new host -- there are still screenshots all over the site, and though Vivendi has pulled video from YouTube before, it's still there as well.
Of course, any C&D sent to the old site would still apply to the new one -- it's just a question now of whether the wiki's new host will comply with Vivendi's demands (the wiki's creators sound very sure that they won't). And after that, it'll be up to Vivendi to determine how far they want to take this -- if they really feel that having this leaked information on that site has hurt them in a justifable way, there is a possibility that an actual lawsuit could be issued, and if this escalates even further, the two parties could eventually end up in court. As always, we'll be watching to see what happenes.