WoW's Wrath of the Lich King enters Alpha testing
In the past Blizzard has done all of this work in the Alpha phase, leaving the game 'behind closed doors' for a very lengthy period of time. The months-long Beta for World of Warcraft, and the very public Beta test for the Burning Crusade expansion, were more public relations/expectation-setting events than anything else. Assuming they follow this path with Lich King, we can expect not to hear much from the Alpha test for some time. Either way, WoW Insider and the Massively team will keep you appraised as we hear news.