J.G.
Hi K.,
I belong to two moms groups I found on Yahoo groups for moms living in Falls Church/Arlington. The first one listed below has a larger membership base but has the requirement of one posting per month or the owner will unsubscrib you from the group. It is undergoing leadership changes in the local group. Arlingtonfcmetromommies has organized playgroups according to age of your child as well as mom's night out/morning out.
The second group is new with no posting requirement. Fantastic local leadership and a membership that is growing daily. I am sure that it will also have playgroups, moms night out, etc. Some of the same people belong to both groups. The purpose is to get moms together offline!
http://groups.yahoo.com/group/arlingtonfcmetromommies/
http://groups.yahoo.com/group/AFC_Mamas/
Congratulations on the birth of your daughter!
J.