Wrath of the Lich King Preview
Blizzard has released some more information on Wrath of the Lich King, including some more details into the abilities of the Death Knight and more on the zones you will be finding in Northrend

Death Knights have a "rune sword" interface element beneath their health that displays six different runes of three different types -- Blood, Frost, and Unholy -- that you can mix and match whenever you're not in combat

If you want to read the full article, click here to go to the 1up preview