Sadly, I missed the very beginning of the episode, so I don't know if Homura's power was clarified. Damnit. Thankfully, I was right on time to catch another hint that Homura is from the future. I mean, really, it's pretty much confirmed now.
As I suspected, Kyubey eats grief seeds (
from the mouth ON HIS BACK). He literally feeds on despair.
Edit: yeah, Homura's power is either brief time stop or teleportation over short distance. As everyone predicted, something bad happened to Sayaka, but I bet no one predicted who would be directly responsible...
And oh god, I was right. Soul gem = soul of the bearer. Their bodies are just empty husk now. Even Kyoko is outraged by these revelations... I'm not 100% sure Kyubey is evil, but he is without a doubt completely amoral. Where will the story go from there? It doesn't seem like Kyoko will remain an enemy, and there's no way Madoka will make a contract with Kyubey after hearing this.