The Wrath of the Lich King Information Wiki, the primary source of leaked information from the friends & family Alpha, is currently not hosting any information on its site. Reports say that the WotLK Wiki team has been served a Cease & Desist order by Blizzard's legal team and given stringent restrictions on hosting Alpha information. A brief message on the site explained how the site administrators were contacted by a legal firm. The issue dealt with a few key points, such as the site referring to themselves as the "Official WotLK Alpha Wiki" despite not being endorsed by Blizzard; not having a copyright on any of the information, necessitating the inclusion of a copyright line to the main pages; and an order to remove all of what Blizzard considered "over-the-line" content such as leaked screenshots.
The WotLK Information Wiki formerly had detailed information on the spells and abilities of the new hero class, the Death Knight, as well as new 51-point talents for most classes. It also hosted and updated a copy of the latest build of the Alpha client, and showed previews of numerous models in the expansion such as speculated vanity pets and armor sets. None of this information is currently available, although the site's message states that they are "having a little trouble" and "hopefully will be back shortly". The current refuge of Alpha-hungry players are in an IRC channel called #wotlkwiki in irc.mmoforge.org, where the header cryptically (or not-so-cryptically) states that "THE MEN IN SUITS, THEY TOOK THE WIKI ON VACATION TODAY. Might return tonight."
If the Alpha wiki team succeeds in conforming (or going around) the rules laid by the intellectual property firm, it might return to serve up information sometime soon. We'll keep a close eye on these developments; whatever happens, we've learned that it's tough to keep a good secret from getting out.