It doesn't start until Monday, though, so the best we can tell you at this point is that Norn Week is the second in an ongoing series of race reveals for Guild Wars 2, and the focus will be moving away from humans and toward the shape-shifting half-giants called Norn in short order. Norn Week will bring new dev insights regarding the game's lore, new art assets, and a new video.
That's a lot of new, but unfortunately you'll have to wait a few more days. In the meantime, head to the ArenaNet blog for the latest official news and views from the world of Tyria.
