Its official, the new World of Warcraft expansion is titled Burning Crusades. The official website is up and confirms a lot of the rumors we originally posted.

From the official website:

World of Warcraft: The Burning Crusade is the exciting new expansion to Blizzards award-winning massively multiplayer online role-playing game. It expands the game by tremendous bounds, adding new races, lands, Battlegrounds, professions and items, and more. Here is just a partial list of what you can expect from the World of Warcraft expansion:
An increase in the level cap to 70
Two new playable races, including the magical Blood Elves
New starting zones in QuelThalas and beyond
The entire new continent of Outland, reachable through the
Dark Portal
Many new high-level dungeons to explore in Azeroth,
Outland, and elsewhere
New flying mounts in Outland
Many new and dangerous monsters, including epic world
bosses
Hundreds of new quests
Hundreds of new items
A new profession: Jewelcrafting
Socketed items
And much, much more…