By now, almost every World of Warcraft fan has heard the news about Cataclysm, the upcoming expansion announced at BlizzCon. Due out sometime in 2010, WoW: Cataclysm promises to alter the game world of Azeroth on a massive scale, reshaping whole continents and changing even the most familiar of starting zones. In an effort to catalog the upcoming changes, our pals over at MMOSite.com put together a killer video and gallery series called WoW: Multiple Comparison of Azeroth's Change by Cataclysm. It's a seven-page series, featuring a video of the main Cataclysm panel from BlizzCon 2009, with commentary and screen caps from the website team. If you've been looking for more Cataclysm info, or just a great video copy of the Cataclysm preview panel, you'll want to check it out.