Foliogal and Dr. Johnson, you're welcome.
Dr. Johnson, according to her agency's submissions page, they don't always respond to e-mail queries. However, it seems like I remember reading Ms. Morgen say that she tries to respond one way or the other, and looking at her older stats on QueryTracker, I'd say that's true. I believe she's had some things going on in her personal life of late that have slowed her down a bit (if the switch back to her maiden name is any indication), so you might have to be a little patient with her right now. According to QT, the last e-mail she responded to was sent at the end of July, so chances are she hasn't even read your query yet.
Good luck!