Update: I have received a copy of the subpoena, and it is for an obscene amount of information, including my credit card numbers, bank account routing numbers, all of my guests' bank account numbers and cc numbers, social security numbers, etc. This is for a time period during which I didn't even have a listing in the state, so while this does not seem to be a data grab for any of my guests, it certainly looks like it is for me.
I have left a message with the prosecuting attorney, and am waiting to hear back. Of course, Airbnb is telling me to talk to the prosecutor, and the prosecutor is telling me they can't share information about an ongoing investigation and I should talk to Airbnb, who is conveniently not leaving me a decent way to reach them outside of the usual crap channels.
Everyone should be aware that this is happening.