Here ya go! I'm excited for you - sounds like there are LOTS of moms connecting around you!
http://www.themomsgroups.com/
My biggest problem as a mommy is that I am a drip when it comes to playdates and sleepovers. It's so much work, to set them up, prep the house, do the snacks, and be entertaining since they sometimes run out of stuff to do to entertain themselves. More power to you if you like doing it! I remember the days when I was a kid when we all ran around the cul-de-sac and in and out of each other's houses. The moms were around, but busy with their own stuff. Wish those days were now. LOL