World of Warcraft is

  • 5,500,000 – Lines of code
  • 1,500,000 – Art assets
  • 33,681 – Production tasks
  • 70,167 – Spells
  • 37,537 – NPCs (non-player characters)
  • 27 – Hours of music
  • 2600 – Quests in the original World of Warcraft
  • 2700+ - Additional quests in WoW: The Burning Crusade
  • 2350+ - Additional quests in WoW: Wrath of the Lich King
  • 7650+ - Quests total (how many have you finished?)
  • 4,449,680,399 – Achievements earned by players since their implementation (this figure is already a few days old, and therefore outdated)

Patches:

  • 4.7– Petabytes (4700 terabytes) of data delivered to players through patches
  • 126 – Different versions issued of every patch, including those streamed to players and issued as self-extracting executables
  • Half – Of every patch’s size is audio

Servers:

  • 13,250 – Server blades running WoW servers, with a total of
  • 75,000 – CPU cores, and
  • 112.5 – Terabytes of RAM

Support:

  • 179,184 – Bugs tracked by Blizzard (most of which have been fixed, according to the presenters)
  • 2,056 – Game masters
  • 340 – Employees in the billing department
  • 2,584 – Total customer service employees

International:

  • 10 – Languages into which WoW is translated

Blizzard Online:

  • 12,000,000+ – Battle.net accounts
  • 900,000+ - Files on WorldofWarcraft.com

Source: World of Warcraft by the Numbers by The Game Reviews