A group of players in California are hosting a 48-hour Cataclysm marathon to attempt the world's first level 85 and raise money for Free Wheelchair Mission, an organization that builds inexpensive wheelchairs for those less fortunate in developing nations. The event kicks off at noon PST today. Article linkage: http://www.zam.com/story.html?story=24330. Seems like a cool event, so I wanted to share.
If you're looking to kill time before Cataclysm launches tonight, they're hosting some in-game events, like a naked level 1 race from Durotar to Winterspring at 6 p.m. PST. Details on how to enter will be announced on their live stream prior to the event.