Boubouille has done quite a bit of detective work the past day or two regarding the rumored World of Warcraft expansion that many expect will be announced at BlizzCon on Friday.
The past two days he's uncovered two very interesting tidbits of information. First, he found that the URL http://www.worldofwarcraft.com/wrath returns a different error(403 - Forbidden) than typing in something completely random like http://www.worldofwarcraft.com/heydudes or http://www.worldofwarcraft.com/orcfood - both of which return 404 - Not Found errors.
Now he's found something else; the German website http://www.usk.de has something called "World of Warcraft: Wrath of the Lich King (GC-Demo)" listed on the website. The GC obviously stands for the upcoming Games Convention, held in Leipzig, Germany from August 23rd to August 26th.
As of right now these are strictly rumors, but this should certainly spark quite a bit of debate!