Blizzard just released information on a new dungon from the upcoming expansion Wrath of the Lich King.

This is the first dungon players will encounter in Northrend, the new zone in Warth of the Lich King. According to Blizzard, it is based for players in the 70-72 level range. Similar to the starter dungons for the Burning Crusade, the Utgarde Keep dungons will be starter dungons. According to Blizzard,

"We expect most players to battle through this dungeon at a brisk pace. You will find that you will probably be able to play through Utgarde Keep much more quickly than its high-level counterparts, similar to Burning Crusade equivalents such as Hellfire Ramparts" Blizzard is working on a new look and feel for the Northrend dungons, including new widgets and effects. One of the most impressive is witnessed in the forge room. From Blizzard:

The very first room in Utgarde is a forge. The fire blasting from the forge is a brand new graphic effect used here to increase the keep's dramatic visuals. You must defeat each successive group of enemies to extinguish the walls of flame, allowing your group to continue.

Go to the official Blizzard site for the full lowdown on Utgarde Keep.