Blizzard announced today that they're going to be dumpling the Armory data and repopulating it as people log in.
A lot of the data on this website comes from the Armory, including the guild events list on the right. This change means the armory is going to think a lot of people are not in the guild, and they will be getting added as the armory gets repopulated.

After WotLK comes out I will be deleting the events history and raising the minimum level cap to 80. This means the list will be pretty empty for a while. I might even dump the gear history, since none of it will be relevant any more.