Do you mean like an online group, or a physical group that you can meet with? If its the latter, I know McLean Bible Church has a Transition to Motherhood group that is really good. I was part of it when we lived up there two years ago. Its full of pregnant ladies in various stages and it was a really easy way to meet people. That's the only one I know of.
there is a group called maryland mommies or something like that. I am not part of it, but I have a friend that is. I know they meet quite often. They are on facebook somewhere.
Check out the Joy Troup on meetup.com. They have soo many sub-groups. There is an expectant mom group, then groups based off location and ages, book clubs, stay at home, work away, ect. It seems like most of the events take place in the Alexandria area but you can always organize events or start a new sub group. There are a couple hundred members so there is always something going on. They are on facebook too.
Re: anyone else in the DC area?
BFP #2 - 11/4/09
My Book Blog
BFP #2 - 11/4/09
My Book Blog