Have you heard of http://www.meetup.com/?
Hannah and I have met so many wonderful people through our stay at home moms meetup group! We have met other adoptive families, people from our church that we hadn't met before, famlies that we now call close friends, and it keeps us busy every day of the week! Most groups have a small yearly fee (ours is only $10) that helps the organizers keep the site up and keep events on the calendar. Our group dues fund socials, pizza parties, moms nights out, etc. It truly was our saving grace when we moved to a new city and knew absolutely no one!
Anyway, I just thought I would pass on this great site to you... I hope you find a fun group!