Loads of Warhammer Online: Age of Reckoning screenshots and artwork have been released today. The screenshots show the Dwarf Capital City of Karaz-a-Karak and the artwork shows the Armies of Chaos.

There's some supporting story below and a description of Thunder Mountain in the forum as it's a bit big.

Mythic's Warhammer MMO is due in 2007, later in the year rather than early I think.

The Chaos Warhost

From out of the frigid wastelands of the north, a great warhost marches upon the northern borders of the Empire. Led by a mighty Champion of Tzeentch, the Great Manipulator and Changer of Ways, this army of savage marauders and potent sorcerers is accompanied by otherworldly creatures both strange and terrifying.

For the Empire, already weakened by the ravages of a deadly plague, the situation is desperate. Without aid, the greatest nation of men will fall before the onrushing army of the Dark Gods, and be transformed forever into a domain of the Ruinous Powers.

The Dwarf Capital City of Karaz-a-Karak

Karaz-a-Karak is the largest, oldest and most venerated of all the Dwarf holds. Called "Everpeak" in the language of men, this vast, proud city is the capital of the old empire of Karak Ankor, now little more than a fading memory. Within the walls of Karaz-a-Karak are mighty temples to the gods Grungni, Valaya and Grimnir. Here also is the throne of power where sits the High King Thorgrim Grudgebearer, the ancient dammaz grom, or Book of Grudges, always at his side.
The enduring city of the Dwarfs is a place both of great majesty and masterful craftsmanship, and never has it fallen to an invader. Now, in the Age of Reckoning, the greenskin hordes have set out on a path of conquest intended to bring them to the very gates of Karaz-a-Karak and beyond. If the Dwarfs are to see their great hold preserved, they will need every ounce of courage, strength and resolve that they can muster.