I so know where you are comming from! For various reasons, our family has moved 4 times in the last 6 years starting with one when I was 8 months pregnant with ds and ending with one when I was 7 moths along with dd. (the bonus is I didn't have to lift anything with those moves
) With the first move I knew a few people as it was a town I had lived in 10 years before but with all the others I knew no one when I moved to town. Being in a place where you have no social network when you have a small child sucks! The lonelyness of being a sahm by itself can drive you nuts but when you realy have no one it can be horrible.
Talk to everyone
with kids that you see. At the park, at the mall in the grocerey store. Where ever! Start by talking about their kids (almost anyone will be glad to talk about their kids LOL) Then tell them you are new in town and haven't met many people. I've found out about play groups and made a few good friends that way.
Then also look for other things that intrest you besides children (yes there are other things besides children!) Try getting involved with some other adult group, book club, art class whatever. Getting out by yourself (if dc is ready) can do you a world of good.
Is there anyone a dh's work that you can invite over for a social visit? Sometimes people who have lived in the comunity for a while will know about things going on that might not be advertised.