July 3rd, 2008. This will either be a blessed day for a lot of us WoW addicted folk, or one of some major disappointment. According to the German site allvatar, they spoke with Blizzard's German assistant community manager Gnorog. He reportedly said that the community managers now had permission to announce the Wrath of the Lich King closed beta as starting on July 3rd.
Now before you go and tell your friends and family what really is important to you (because lets be honest, WotLK beta > 4th of July, right?) you need to consider that this is nothing more than a big ol' rumor.
This information came from Gnorog when he was at the World Wide Invitational in Paris this past weekend. I know that Gnorog exists and is a German community manager, but I can't confirm that he was at the WWI (although I'm sure he would have been). We get a good amount of beta and release rumors every day here at WoW Insider, and half the time they refer to people that aren't even real. So this rumor gets +10 for referring to a real person.