First of all, stop using Obliterate. It is consuming all your diseases, meaning your rotation is doing way less damage than you could be. Use: PS/IT->PS/IT (doesn't matter the order with your build)->DS->HS->HS->DC->DS->HS->HS->HS->HS->DC, repeat (on the off chance it isn't already dead). You can also replace 2 heart strikes in the second half with a DS.
Also, what Rune are you using? Right now, you have the choice of Razorice, Lichbane and Cinderglacier. I would go with Cinderglacier, personally (and I did) until you get to Rune of the Fallen Crusader at level 70 (which will be what you will always use as a DpS, more than likely). Cinderglacier procs a decent amount, and essentially is 20% more damage on a Death Coil. I do not remember if Necrosis damage is affected by it and/or eats a charge. But I remember pretty very fun situations where I got a CG proc and a SD proc, giving me a free DC with an additional 20% that CRIT, plus another that was +20% that may or may not crit.
As to talents, you are losing a lot more DpS than you realize in favor of way more healing than you should ever need.
There is really no need to take Improved Rune Tap. During the small span when my leveling Blood spec had it, I only needed to use the 10% ability a few times, and only when I got 2-3 additional adds.
Spell Deflection also isn't really worth it. Just use Anti-Magic Shield if up against a caster. And take them out first if you have multiple mobs.
Bladed Armor is also a TON of attack power. You have around 5K Armor when you first get your DK. That is 100 AP (50 str) for 5 talent points. A hefty DpS boost.
PERSONALLY, I think Bloody Vengeance is near useless for leveling. Things died way too fast for me to ever get much use out of it. Hysteria isn't that good for the same reason. The only time that kind of DpS is needed is when things are dealing too much damage for you to want to use it.
You also don't need Blade Barrier and Anticipation. They are great mitigation, but all of Blood's self-healing should be more than enough to handle it.
Also, are you sure you want Garg to be your dinging point? That means you won't have any RP dump beyond DC until level 80, when you will be respeccing anyway. I'd make your next point DRW. It will help a lot in mowing down groups, Blood's weakness. Although, if you are willing to respec now, I would recommend something different.
Necrosis is also a lot of damage. You don't even have Rune Strike yet, so taking it would mean 20% more damage on all of your auto-attacks.
Here is what I did for a
61 Blood. For the next 6 levels, just go straight down to DRW.
After that, you will want something like this at 75.
Then, go for 3/3 Outbreak. There, you will be 78 and have had a flier (I'm guessing not epic) for a level. You can go for On a Pale Horse to do all your dailies faster, making an 60% flight speed go 80%, or your 100% ground speed go 120%.
Or, (what I would do if I DID have an epic flier) go for 2/3 in BCB or go 1 in BCB and 1 in Shadows of death.
A final option is to respec, putting taking the last 6 points out of Blood and putting them in Unholy, letting you do
this.
All of these things will increase your DpS, letting you level faster, without sacrificing utility (or, rather, sacrificing any utility that is actually important).
[EDIT]
And, as to glyphs, I would use:
Glyph of Blood Strike (affects Heart Strike as well).
Glyph of Death Strike (also has a modifier with amount of RP, that isn't shown on the tooltip--good glyph a lot of the time).
Glyph of Pestilence (by far the best minor glyph)
Glyph of Raise Dead (no longer have to carry corpse dust).
At level 70, grab the Glyph of Horn of Winter.
At level 80, go for Glyph of Plague Strike and make sure it comes after Icy Touch in your rotation.
Edited, Apr 4th 2009 2:55pm by idiggory