A.G.
There's a great one called MOMS Club (stands for moms offering moms support)of Portland West Hills. Here's their website. Hope it helps. http://www.geocities.com/portlandwesthillsmoms/
If the link doesn't work for some reason, you can find off the main website, www.momsclub.org
It's a great group to be a part of for a first time mom and/or one who is new to the area.
A.