Well, I'm in Louisiana so Beau is a very appropriate name for a boy in this area. In fact, I've been getting advice to add an X to the end to make it more cajun and less French.
I thought about Belle, but we already have an Isabelle in our family and almost everyone calls her Belle. I'm holding out for Annabelle Lee, but my DH doesn't like it and he didn't even know about the poem when I suggested it. We're 95% certain its going to be a boy though. Maybe he'll turn around at our next ultrasound appointment and we can know for sure!