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This deck has some good cards in it but its not focused towards any real plan. For example: Stromkirk noble is a really good play on turn one. If you can drop a curse of stalked prey on turn two, even better. The chanses of pulling it off are very slim with only two copies of each so we need to cut the fat to make room for better stuff...
12 x Mountain
12 x Swamp

2 x Victim of Night
2 x Tribute to Hunger
2 x Curse of Stalked Prey

1 x Olivia Voldaren
2 x Stromkirk Noble
1 x Bloodcrazed Neonate

These are the core cards i would start with. Both noble and Neonate have the +1+1 counter thing going for them. Creatrue removal so these guys can get through for damage would be good, and why not pump them at the same time...
Lets add some Volt Charge .
You allready mentioned Bloodline Keeper which is solid...
With Illusions and one toughness creatures running around lets add Gut shot .

The list i would start with would look more like this:

8 x Mountain
8 x Swamp
4 x Dragonskull Summit
4 x Blackcleave Cliffs

4 x Doom Blade
4 x Tribute to Hunger
4 x Curse of Stalked Prey
4 x Volt Charge
3 x Gut shot
2 x Black sun's zenith

2 x Sorin Markov

2 x Olivia Voldaren
4 x Stromkirk Noble
4 x Bloodcrazed Neonate
3 x Bloodline keeper

The first thing I should mention is that a lot of your spells and creatures are underwhelming, and the ones that are good really should go up to 4 copies (usually).  Also, your sideboard makes very little sense, and looks more like a collection of cards that didn't make it into your maindeck opposed to specific answers for troublesome decks in your meta.  Here's a revised list, and I must warn you, I am going to do some aggressive chopping, and am not going to be keeping a specific budget in mind.  

Creatures: 24
4 Stromkirk Noble - Arguably the best 1 drop creature in standard.  You want 4
4 Bloodline Keeper - A compete house, even if he doesn't flip.
4 Adaptive Automaton - Gives all your dudes +1/+1.  I like him over Rakish Heir since he doesn't require your guys to get a hit in before the bonus takes effect.  
4 Vampire Interloper - Probably the default 2 drop creature for black/red.  2 power and flying work in the deck.
2 Olivia Voldaren - This card is insane.  Don't let anybody tell you otherwise.  If she stays on the table she wins games.  
3 Rakish Heir - Good, but not great, since you have to actually connect with your creatures before they get a bonus.  I was hovering between a 4:2 split of this and Bloodcrazed Neonate, and just decided to go 3:3
3 Bloodcrazed Neonate - A decent 2 drop.  Not exciting, but decent.  

Spells: 12
4 Brimestone Volley - A great burn spell.  The fact that it can potentially do 5 to somebody from nowhere is amazing.  
4 Doom Blade - Probably the best spot removal for your deck, since there is very little black running around these days
4 Geistflame or Gut Shot - There's enough 1 toughness that both are relevant.  Geistflame provides card advantage, but gutshot can cost 0.  I personally prefer Geistflame, but it's your call.  

Lands:  24
4 Dragonskull Summit - A strict improvement over a basic if you can afford it.
4 Blackcleave Cliffs - See above
3 Stensia Bloodhall - It gives you reach in the late game, helping push through those last few points of damage.  
7 Mountain s - You have a slight bias towards red in the deck, as reflected in the additional mountain.  
6 Swamp s

Sideboard:  15
3 Arc Trail
4 Tribute to Hunger
3 Sever the Bloodline
3 Curse of Death's Hold
2 Witchbane Orb

Now to explain what I did.  

The first thing I did was go through your list and cut the cards I don't like (mainly because they aren't that good, but also because of other factors, such as not working in the direction of your deck)
Vicitim of Night:  I cut this because of the double-mana cost.  The increased difficulty in casting this in your deck doesn't offset the increase in power, so I replaced it with Doom Blade (which is a better choice over Go for the Throat because there are so few black decks in the current meta).  
Tribute to Hunger:  In a slower deck I'd play them in the main, in yours they're better in the side against decks with a lot of hexproof creatures or only a few large threats.  
Maw of the Mire:  Generally speaking, targeted land destruction is bad, and this is no exception.  By the time you cast this they usually won't care about a land, so really all you are doing is paying 5 to gain 1 life, which is not  good.
Curse of Death's Hold:  Sideboard material against aggro deck and MAYBE against Inkmoth decks, not maindeckable.
Traitorous Blood:  Usually you'd rather just have another creature or removal spell, so I cut it.
Vampiric Fury:  The effect just isn't worth a card in standard.
Curse of Stalked Prey:  Some people like this.  I don't, mainly because it is so easy for this to just sit on the table doing nothing.  Having another creature or spell is probably better.  
Blood Seeker:  Maybe sideboardable against tokens, but in the main deck this doesn't do much against most decks.  
Falkenrath Noble:  Same as Blood Seeker
Stromkirk Patrol:  Too expensive for what you get.  
Manor Skeleton:  Too small, and not a very good creature.  There are better choices.  
Balefire Dragon:  Far to expensive for this deck.  Olivia Voldaren already tops out your curve.
Instigator Gang:  I've found that they don't flip enough to be relevant.  Although it is an interesting card, I personally think replacing it with something smaller and faster would be better.  
Dragons Claw:  As a general rule, life gain is bad unless it comes attached to something that's good.  A do-nothing artifact is not good.
Trepanation Blade:  This is just a bad card.  The variance is too high and for every time you flip 10 cards you are going to have 40 times where you flip a land.  

Hope this helps  

Cut Blood Seeker and Dragon's Claw, and make it a full Innistrad deck.

Dec 8, 2011 -- 11:01AM, PaPaGarheade wrote:

One thing I am trying to do is avoid adding too many cards from the previous Block. Like most people I'm on a budget and I'd rather not invest in cards I cannot use in two years, though indiviual cards may still be worth while.

Just so you know, your Innistrad cards will rotate out in a couple years. Scars block will rotate next fall. If I were you I would pick up the cards Regal Fanton mentions. You really cant compete in a standard environment running a block deck (especially when there is only one set realeased for said block) but you can certainly build a standard deck on a budget.

Basically, run sligh splashing black.  Check out my list in the RDW thread.  This is terrible, just terrible.  It's not your fault, intro packs are horrifyingly bad.  If we get some okay vamps in AVR, we could have a decent deck on our hands, but right now, there's really not enough decent vamps for a deck.