Chillborn: great concept, cool mechanic (more zombies in the room = more chill). The name isn't too terrible either. I will be using this one a lot. Oh yes.
Corruption: sort of reminds me of the zombies in Quake. I think. Or was itResident Evil? I can never keep those first-person shooter games straight. Anyway, spiffy idea.
Gravehound: Straight out of Resident Evil. Some will balk at the "videogameyness" of this beastie (especially that "final strike" ability), but I dig it.
So that's 3/3 for me.