Well, I'm gonna keep trying for now, I think. A friend of mine on Facebook put it rather succinctly: there's a lot of "antsy" vanity books out there. He's right. I feel like, if I can just get this published, that it would be a respectfully successful thing.
So today, I sent a query to a literary agent, Ethan Ellenberg. Plus, I'm still waiting to hear back from Ace/Roc publishing. Fingers crossed, folks.