Blood Tanking in Cata

[Air]

Here's a guide I'd recommend to anyone who wants to tank as blood.  It's very detailed, covers pretty much every aspect of blood tanking.  The guy writing is a well known dk tank, and is very knowledgeable.

http://pwnwear.com/forum/death-knight-tanking-guide-blood-t703.html

This one is more for current blood tanks at 80.  There's alot of info here, but nothing detailed.  Good if your looking for a quick answer.
http://pwnwear.com/forum/death-knight-tanking-guide-t711.html