I have to admit that I have some concern that this style of AE farming won't be viable for Death Knights everywhere, since in this video, he relied extensively on getting Runic Power via Vendetta due to quick kills on the low HP slimes in the Pools of Aggonar. On the other hand, it looks like a lot of fun, and solidifies my personal resolve to try an Unholy build first.
After the break, we'll watch the Blood video.
The Blood video is a rampage through Andorhal that showcases the brutal damage and lack of downtime that speccing deep into the Blood tree can provide. It's only a level 57 build too, so it has plenty of room to grow. It showcases the power of the life-stealing blood worms created with Infested Corpse, combined once again with the healing power of Butchery and Vendetta, which look like they'll be practically required for any good leveling or grinding build.
They're both awesome videos that give a good taste of what playing a Death Knight is currently like. Certainly, Death Knights can still change drastically in the future as they're polished before they go live with the expansion, but for now, they at least look like a fun class to level and have multiple unique and versatile options for DPSing.
Edit: Video embeds changed over to Filefront. Vimeo seems to be having trouble. Sorry, folks. -Alex