Hang in there KPG! It's OK to feel down and I think it's OK to let your kids know you are having a blue day or two -- I'm sure they miss OH too. You've done the right thing for you family and I am sure it will pay off in the end.
I'm not sure of the ages of your kids...but have you heard of MOMS Club? They are mostly geared towards smaller kids but have lots of activities and it's a great way to meet mommy friends in your area. I felt really blue when I first moved and once I discovered MOMS Club I was so much happier -- it was as much, maybe even more, for me as for the kids. I know our local MOMS Club has several special kids in it too. I googled one for Cranberry
My DH is from Pittsburgh and we visit there about once a year. I'm not totally sure where Cranberry is tho -- I get so turned around there and would be lost if I was driving. Anyways, if you manage to get into the city, go check out the children's museum
. We love it and go for a day whenever we visit.
Hugs -- Adri