Blizzard announced today that the WSVG will be hosting a guild challenge at their events as outlined here:

Do you have guild pride? Want to prove your guild to be the top guild in World of Warcraft? Want to visit the Blizzard office with your guild? Here’s your chance! The World Series of Video Games is hosting the WSVG Guild Challenge. Guilds will compete in a series of in-game and live events at the Louisville and Dallas WSVG stops. Please visit www.thewsvg.com for more details.