When Harry is talking to Marcone at the end of White Night, he draws parallels between the Mobster and Hades.

Just prior to that it was mentioned that the captain was from Spire Olympia. Which would reference that the Furies were a part of Greek Mythology.

I'd have to reread, but I do believe they sustained a crippling amount of casualties.

It's not specifically mentioned in the book, but I imagine it's a hold over something that Etherealists did in order to create "super-soldier" types at sometime in the distant past. 

I recently stared running a game and one of the player's character concept has me unsure how to fit it in a Dresden Game. His character is a werewolf that works for in his words "the Pack Leader of the US". Now I'm not opposed to the idea as such, but given the variety of werecreatures that exist in the Dresden Files, I don't believe a controlling hierarchy for all such creatures could exist. I do believe however that the mentality of wolves might lend itself to something of a secret society. So I've decided to incorporate this into the campaign. But my question is what aims might a group like this have beyond simply protecting each other and their hunting grounds?