This Friday and Saturday, Worldofwar.net will be holding two "level 1 character" race events on as-yet undisclosed U.S. servers. 5 Worldwide Invitational cards, entitling the bearer to a Wrath of the Lich King beta key and a Tyrael pet, will be awarded to the winners. The character you enter in the race must be level 1, cannot have any weapons or armor equipped, and will be disqualified if you die, disconnect, or try to sneak any stat-enhancing item on the toon. Apart from saying that they'll be holding the races at 6:00 PM server time on both days, they're staying mum on which server or starting area they'll be using in an effort to minimize potential cheating or a mob of ganking spectators.
Two things: I'm not sure how they're planning on splitting 5 WWI cards among the winner/s of two races, so you'll probably have a slightly higher chance of winning a card in one out of the two events. Secondly, although they haven't given out server names, they do say that both races will take place at "18:00 PST (server time)," so it's possible that both will happen on Pacific servers. They'll post the server names and starting areas on their site before each race starts, so check back, and good luck!