Hi J.,
This is the exact reason that I came to the board myself. I do not know of any, but I have been thinking of posting on iVillage (or here) and seeing if anyone in our area would be interested in starting one... just something informal - no dues or anything. I tried the Kingsland Moms Club also, and found that most of the women there had been doing it so long that it had turned in to "a bunch of friends" which, of course is the point, but it was very difficult to get into that "circle". I went to two or three meetings myself and the only person who ever spoke to me was the president. It seemed a little "clique-ish" which I am not into. I have a seven y/o son and a 3 y/o daughter and would love to find something like that around here. For your child's age, I believe you still "qualify" for Stroller Strides... a group of new Moms with young children who meet to exercise and meet people as well as let the children play. I had asked about it about two years ago and there was no group here at the time, but now that there is, my daughter is too old from what I have read on the website for Stroller Strides.
Well, good luck in finding a group. I am still going to keep researching and if I find anything, I will post back here and let you know.
N.