It's now official

The concrete skeleton of the Burj Dubai has just surpassed Taipei 101 to become the tallest building in the world - and it's still nowhere close to completion. At 1,680 feet, the building is more than a quarter-mile high."Burj Dubai is now taller than Taipei 101 in Taiwan, which at 508 meters has held the tallest-building-in-the-world title since it opened in 2004," Emaar Properties, which is