Jennifer, have you tried asking local midwives (birthing centers) etc... for references? They must be swamped with cards/info from local photographers. Or maybe there is a "professional" photographer print shop in your area... they may give you some leads.
Well, she's not technically a maternity photographer, but there is a woman in West Marin whom I love. She did photos of my son when he was a baby that were fantastic, and I am actually going to see her on Saturday to do some maternity photos. I think she only does work at her West Marin studio though. If you're still interested, let me know and I will give you her name and number.
Sorry I'm late posting on this. I had maternity pics done by a photographer named Jessica Anne of Creative Images in San Ramon. She was wonderful. I believe her website is www.creativeimagesbyjessica.com
Jen, former attorney and now SAHM to 11 yo ds and 8 yo ds