T.H.
Yes, where do you live? My kids go to Valley View Parents Day Out and Preschool and I've met a lot of fun moms there! I don't go to church there but there is a mom's group that I go to that is for both the schools and the church. I will admit we aren't quite as fancy and organized as some of the other MOPS groups I've heard about but it is a really nice group of ladies ranging in ages of moms and kids! We meet twice a month and there is free child care.
Also, when the weather gets warmer there will be a lot more people in the parks and stuff. I met my two closest mom friends from a work out class I used to take. It was a stroller fitness class. My friend doesn't teach hers anymore but I think there are still a few in the area, so maybe google it. Stroller Strides is one class, I'm not sure if there are others.
Also check out Music with Mar. It is an awesome music class that we used to go to a lot! Beth Whelend (not sure of the spelling on the last name) teaches it in the Olathe area (not one in OP) and she's awesome. Plus the classes are cheap and my kids loved them! My oldest is now 5 and she just begged to go back there! There were a lot of nice moms in there. Google Music with Mar and it should come up. She teaches out of a big church in Olathe, it's pretty easy to find.
Those would be my top suggestions. Feel free to PM me if you have other questions! Welcome to the neighborhood, it really is a pretty good place to live! :)