I joined Mommy N Me here, and to be totally honest, the mommies were very cliquish and rude. The first thing I went to, not a single person said hello to me, and I am a very warm and outgoing person! I am sure it just depends on your area. Some of the activities here are really fun for older (2+) children, and when DD is a bit older we will consider trying to participate again.
That being said, I also joined baby playgroup through MNM that I love. I got really lucky there - the mommies in my PG are wonderful, 3 of whom are AP'ers, and 2 of us are extended BFers so the comrardarie is really nice. We keep the group small - 5 of us, but we rarely all make it to every gathering.