Blizzard Entertainment (the company behind World of Warcraft, Diablo, and StarCraft) just recently announced the dates and location for their 2009 BlizzCon convention. It will be held at the Anaheim Convention Center in Anaheim, California on Friday, August 21 and Saturday, August 22. Tickets are not yet available, but one can only hope that getting them will go a little smoother than last year. (In case you didn't hear about last year, here's the short version of the disaster: the website crashed under the traffic, and as a result Blizzard offered up 3,000 extra tickets to smooth things over, but in a lottery system.)
BlizzCon is considered THE convention for World of Warcraft (WoW) players in particular. While other cons offer MMORPG programming (and even some WoW specific events), BlizzCon is run by Blizzard itself (not fans), thereby offering content and events that no other convention could hope to top. For example, BlizzCon was offering exclusive in-game WoW items to attendees in 2008 (which some think is what exacerbated the mad rush for tickets).