Hearthpwn

UPDATED 1/8/16
As many have said, this deck became too slow once everyone figured out murloc aggro decks.  I've brought down the curve and updated the deck to be much more competitive against aggro, and still hope to be a good match against other battlecry/deathrattle decks.  Thanks for the feedback! Changes are:

+1 Bear Trap
+1 Explosive Trap
+1 Flame Juggler
+1 Unleash the Hounds
+1 Mind Control Tech
-1 Snake Trap
-1 Ironbeak Owl
-1 Lil' Exorcist
-1 Loatheb
-1 Dr. Boom

General Guide
Using the "Battlycry Bonus" brawl effect, the goal of the deck is to out value all of the deathrattle decks with huge battlecry effects and beast synergy.  

Desert Camel and Injured Kvaldir
Desert Camel will summon your Injured Kvaldir.  Since it was summoned from the deck, it doesn't take the 3 damage to itself and instead gets the +1/+1 brawl effect.  This gives you two 3/5 minions for 3 mana to trade with and take control of the board.  
- Against deathrattle decks, the worst this will pull out is maybe a leper gnome or zombie chow.  
- Against battlecry decks, it might pull out an abusive sergeant or Sir Finley
- Against murloc decks, this can be bad as it will pull an Oracle or Tidecaller

Bear and Snake Trap
When I was playing the deck I was seeing a lot of aggressive deathrattle/murloc decks, and these 2 traps are great for dealing with aggro.  Getting 3/3 worth of stats for 2 mana (or for free from Mad Scientist) is always good. There are a decent amount of taunts, so snake trap is very likely to be triggered.  The traps are some of the most flexible slots, so if you are seeing way more aggro (murlocs) you can try explosive traps, or if you are seeing big deathrattle minions (dragon priest, deathrattle rogue, druid, etc) then freezing traps can be huge tempo swings.  Bear and Snake also provide more beast synergy with Kill Command, Houndmaster, King of Beasts, and Ram Wrangler.

Brann Bronzebeard
Brann can give huge value on the board.  Try to protect him for a long as you can.  With Brann, Houndmaster can give you 9/8 worth of stats, Defender of Argus can be 7/8 worth of stats and two taunts, and summoning two beasts with Ram Wrangler can just be game over on it's own.

Tech Choices
Loatheb - I found him to be very helpful in stopping warlock shenanigans with Power Overwhelming/Shadowflame, and also against spell/freeze mages.  A 6/6 body is great and if it stops some spells, it can be the tempo swing you need to start trading less and going aggressive.  Possible substitutes are Azure Drake, Bomb Lobber, Frostwolf Warlord.
Unleash the Hounds - Helpful against aggro decks like deathrattle warlock and murloc decks to clean up low health minions and provides beast synergy.
Lil' Excorcist - I found her to have great value in slowing down aggressive decks.  She gets the +1/+1 for being a battlecry minion and often gets multiple +1/+1's against deathrattle decks.  With Brann, she can easily become a 5/6 or bigger taunt for 3 mana.  But if you aren't seeing many deathrattle decks, you could swap her out for something like another Unleash the Hounds.
King of Beasts - I originally had Savannah Highmanes in this slot, but found them to be too slow against aggressive decks.  Baseline, it comes in as a 3/7 taunt, often becoming 4/7 or higher with beasts on the field.

Possible Cards to Try
Abusive Sergeant/Lance Carrier - Would help trade up against bigger/taunt minions or push for damage
Mind Control Tech - Would help against murloc flood decks. Steals two minions with Brann.
Hungry Crab - Eats a murloc and becomes a 4/5 for 1 mana, but could be pulled out by Desert Camel.
Sir Finley Mrrgglton - Since the deck is more about controlling the board than aggression, having a different hero power than Steady Shot could be very helpful, but could be pulled out by Desert Camel.
2nd copy of Ironbeak Owl, Unleash, Exorcist, or Defender of Argus

Thanks for all the upvotes and views!  Let me know what you think in the comments and what changes you would make!  

Mallehoney