Mike Morhaime spoke up about World of Warcraft in Activision's earnings conference call last week (strange, since there was almost no sign of Blizzard at the Activision press conference during E3), and he spoke about Blizzard's plan for Wrath of the Lich King's release in China. In the past, there's been a signficant delay between releases in the US and Eastern companies (not that it's hurt the popularity there). And Blizzard says they want to close that delay, but it's up to the government over there to approve the content -- in the past, the government of China has asked for changes to be made to the game, and Blizzard says the release schedule is dependent on their approval.
Morhaime also said that the game continues to grow -- they've seen big growth around marketing campaigns, the holiday season (when people buy the game for others), and the release of new content. And you don't have to be a WoW expert to see that they're going to hit a perfect storm of all three later this year. This could be the biggest winter the World of Warcraft has ever had.