Diablo3.eu is now pointing to a Forbidden 403 error page. This happened a few days before World of Warcraft: Wrath of the Lich King was announced at Blizzcon.  When going to worldofwarcraft.com/wrath/  a Forbidden 403 error page would show up too.

https://www.diablo3.eu

Domain Name:  diablo3.eu
Status:  REGISTERED
Registered:  April 7, 2006
Last update   August 10, 2007 7:32 PM
Name: Domain Administrator
Organization: Blizzard Entertainment

Update: us.diablo.com recently used to point to Blizzcon 2007 website.  Now it is pointing to the Blizzard Jobs webpage.—Thanks, earthgore.

The www.diablo3.es is now displaying a Forbidden 403 error page.  Both the URL are European websites registered by Blizzard Entertainment.