Blizzard is really making a good effort to make Death Knights feel like a true hero class. They start much higher at level 55, they have their own starting area in the Plaguelands, they have their own character screen background design and much more. They will also have their own class specific flying mount, a first for World of Warcraft. Druids don't count since they become the mount using flight form. Death Knights will be able to pick the Winged Steed of the Ebon Blade up for 950 gold from Dread Commander Thalanor in Acherus the Ebonhold in EPL. Take a peek at it from the video below.
For those people who don't exactly like flying around in a pile of bones, then this isn't for you but at least the option is there for those who consider this bad ass. This is also going to help those role playing Death Knights look the part.
See some pictures here and here.