I still don't see why many frost tanks bother putting points in Morbitity. Really. DnD is practically worthless for a frost build, HB+BB is going to net you more threat for the same amount of runes, and allow you to put those 3 points into something useful. Pick up Virulence only if you're low on spell hit, otherwise you should drop it and plow those points back into the frost tree.
10/56/5
No nonsense, all purpose 2H frost tank build. Heroics, 10-mans, 25's, whatever. Good for main tanking, great for offtanking, superior for aoe tanking. Sure, you could float the point in Hungering Cold to something else, and swap out the 3rd major glyph for, say, Disease. Or Rune Strike, or Frost Strike, or Obliterate. Pick your favorite, the first two are the real essentials. I LIKE Hungering Cold, it's great for grabbing unfortunate patrols, interrupting casts, and stopping (or at least delaying) your casters from getting squished. Pick up gear with solid defense, gem for hit rating and strength. Don't feel like or can't affodr dual-speccing? Get some dps gear, switch to blood presence, and this build puts out respectable damage when not tanking (more than a prot warrior or paladin, to be sure).
Now get out there and tank.