N.B.
Hi S.,
You might want to check out MOMS CLUB (http://momsclub.com/join.html) to find a playgroup in your area. I joined when my daughter was 3 months old. That was 5 YEARS ago and our group still gets together (well tires to anyway) once a week or so. More importantly, I have made some great friends in the mommies in our playgroup. My daughter will be starting Kindergarten in the fall and one of the kiddies from our playgroup will be at her school too!
Temples are great as well. We are in the East Valley and belong to Temple Beth Hillel and I am very involved in their Early Childhood Education program. We started with the Mommy & Me class and my daughter graduated last month from their preschool program. I am also on the ECE Executive Board if you have any questions about the program.
We have a 4 month old now too, so I will be doing it all over again!
Good luck and welcome to baby #2!