I dunno if you even still swing by these forums anymore, but take a look at this.
http://www.raevyn.net/wiki/files/talent/deathknight.htmlIt doesn't look like dual wield will be viable with all the survivability talents being taken out of the other trees and moved to blood. Also consider that with the removal of defense from gear, Improved Blood Presence will be MANDATORY to tank.
Edit: Looks like Blizzard is making new trees entirely. Derp.