Here's an interesting concept painting for the Al Burj.
That's the other world's tallest building they're planning to build over by the Palm Jebel Ali, actually part of the artificial islands called the Dubai Waterfront. Where we tried to go camping the other day.
Obviously this is different than the Burj Dubai, which is already half-way constructed, and is planned to be Dubai's first world's tallest building.
It's also not to be confused with the seven star Burj al-Arab hotel.