R/B/g Dark Zoo

Lands (19)
4 Bloodstained Mire
3 Wooded Foothills
2 Polluted Delta
3 Badlands
2 Taiga
2 Bayou
1 Mountain
1 Swamp
1 Forest

Creatures (19)
4 Kird Ape
4 Carnophage
3 Rotting Giant
4 Dark Confidant
4 Tarmogoyf

Spells (22)
4 Lightning Bolt
4 Chain Lightning
3 Seal of Fire
4 Magma Jet
4 Duress
3 Cabal Therapy

Sideboard (15)
1 Cabal Therapy
2 Unmask
4 Engineered Plague
3 Krosan Grip
3 Pithing Needle
2 Umezawa's Jitte

This is similar to the version of 3c Dark Zoo I've always played... except now that Tarmogoyf is around, it's changed a little. Tarmogoyf replaces Dryad, and Seal of Fire replaces Fireblast. This list goes in a bit of a different direction from yours Zulander, because I cut the 3cc spells of Negator and Call as well as the MD Jittes. The biggest concept of the deck for me was always speed... you want to drop cheap undercosted beaters, back them up with cheap burn, and race the opponent before they stabilize. If they manage to stabilize, you have a ton of additional burn to go to the dome. It's traditional G/R Beats philosophy. When you start running larger costed threats, the deck becomes much more midgame... and I don't really want to do that with this sort of deck.

More burn is much more important for winning the Goblins matchup than Jitte is, I think... if they can't committ anything to the board, they are going to have a hard time winning. More burn overall also improves your control matchups. I also really like Magma Jet in these kind of decks... aside from Confidant, you run absolutely no draw. Zoo decks tend to have problems when they run out of gas and go into topdeck mode. Magma Jet helps alot and, with Confidant, it gives you a solid "draw" engine. Not only that, it also increases your instant count for Tarmogoyf since the deck is heavy in sorceries and lacking in instants.

I'm by no means preaching this list, these sort of lists are obviously open to tons and tons of intrepretation, metagaming, difference in playstyle, etc. The whole fact that I don't run Negator makes it a completely different deck, for example, while Negator itself is still a really good card even without Dark Ritual. I just felt I'd voice my opinion on the R/B/g Zoo style deck and show the decklist I'd use.

As far as my SB goes, the extra Therapy and 2 Unmasks come in against combo and control. I really didn't want to run E Plague because the Goblins matchup is good already but I wanted an answer to EtW tokens and the other options just seemed to conflict with the deck (EE hurts me, Pyroclasm hurts me, etc). Krosan Grip answers randomness, Pithing Needle answers randomness, and the extra 2 Jittes can come in against larger midrange aggro (like Thresh, GRb SA, etc) and even Goblins if you want overkill.