I went 1-2...

...at the Gatecrash pre-release so maybe you don't have to.

I chose the Simic guild and here's what I ran:

2 Experiment One
Crocanura
Wildwood Rebirth
Ivy Lane Denizen
Greenside Watcher
2 Scab Clan Charger
Adaptive Snapjaw
Naturalize
Metropolis Sprite
Agoraphobia
2 Frilled Oculus
Aetherize
Cloudfin Raptor
Skygames
Totally Lost
Hands of Binding
Simic Fluxmage
Pit Fight
Elusive Krasis
Drakewing Krasis
Rubblehulk
Zhur-Taa Swine
Lands

Walking home I could sense I made a mistake. Why did I run this? Because I thought that the awesomeness of the guild stuff I got would be better than the other colors I had to run on. Here's what I should have built:

3 Slade Street Ruffian
Smog Elemental
Killing Glare
Gutter Skulk
2 Scab Clan Charger
Metropolis Sprite
Agoraphobia
2 Frilled Oculus
Aetherize
Cloudfin Raptor
Totally Lost
Hands of Binding
Eliusive Krasis
Drakewing Krasis
Dimir Charm
Lasav, Dimir Mastermind
Lands

What's better about this? 1) More removal. 2) Lasav is going to be insane with Bloodrush in a Limited format. 3) Better creatures-ones people don't want to block 4) Lasav! Seriously: I had reasonably playable black and I ignored it because 'guilds'.

So good luck today, and don't ignore what's right in front of you.