Unholy DPS

This build optimizes the diseases of a Death Knight in order to fully maximize his dps. His minion becomes a permanent pet, allowing it to function almost as well as a hunter pet. The unholy specs down to the Summon Gargoyle talent and then some. The gargoyle will optimize damage output and the night of the dead talent will allow army of the dead to be used a lot more often =D
The spec into the frost tree is for annihilation. Obliterate can be such a great damager...but at the cost of your diseases. With annihilation, this problem is eliminated, thus replacing scourge strike with obliterate for optimum potential.
This is a very fun build that keeps you alive almost to the point of a tank if you play right.
Just remember...most people see the Death Knight community as that of "noobs" and people who don't know what they're doing...and I can't say I disagree. If you're new to the game...keep your head low and just ask quietly or search online for all the questions you need.
www.thottbot.com
that is a useful site for looking up all of the skills and quests you will ever come across in your WoW career.
Have fun!