Just wanted to update folks here. I went ahead and contacted a few firms that specialize in these types of scams. And, guess what? They are already aware. Surprise, surprise! Through my correspondence with them, I have figured out that this would require international jurisdiction. Since I'm based in the US, this would most likely indicate the fraudsters are not. Also, since this appears to be a complex case, it will be very expensive to begin legal action (to the tune of six figures).
But, don't give up hope! It's clear that other victims are on the hunt as well and it's possible that they can't disclose any of their findings due to ongoing investigations. I totally understand that position and warn others to think about that before posting. Please continue contacting your local law enforcement agencies and bring some more attention to this scam. I will continue my search for a more cost effective resolution to this whole mess.
Oh, and having said all that, I'm open to suggestions on where to go from here, pooling resources, etc.
It's going to go nowhere unless law enforcement can look into where the owner of the site is from. Without that information, it is impossible to give any advice. Each country is different and each state is different. Sometimes it even varies from city to city within the same state. So until we know where the person we're dealing with is from, there is really nowhere *to* go.