Well, hell, It's supposedly live now.
I'll confirm this when I actually get the rules in this afternoon, but this should be about right: 1 whisperer pack (includes whisperer and piglet), 2-3 packs of piglets (three each in the pack), 1-2 warpigs and Teeth.
I prefer big pig lists though. My current favorite is Teeth, 2x whisperers and 3x warpigs. Teeth, 2x whisperer, 2x warpig, and 4x gremlin isn't bad either. But I'm not a big soulstone user, so you could also do well with a teeth, 1 whisperer, 2x warpig, 4x gremlin 1x piglet, which would be an easy purchase as it'd be the box set, plus a warpig and a whisperer.
Edit: Please ignore suggested lists-- my math was off. the rest of the info's good, though.