S.N.
I'm with ya sister! Since becoming a mom in August 2009, I've lived in three different states, and it SUCKS! I need community. Yesterday I was feeling particularly lonely. I think all the dang rain we've been having hasn't helped...
Anyway, with each new community I try to get in there immediately - go to the library storytimes, find the parks, find the free mommy and me classes and what not, but actually making a connection with someone takes time, time, time, and luck(!) for finding a good match. Someone who is looking for a new friend too, that y'all get along, and the kiddos get along. I think just posting this will help, put it 'out there' that you're looking for help. Something/someone will come along and things will get better. At least that's my hope, anyway.
I just mapped where Plainfield was and its proximity to Princeton. We're a bit far away from each other, or else I'd say let's meet! I'd second someone else's comment about trying meetup.com. I just got onto that when I moved here and have found out about some more opportunities in the area.
My best to you! Hang in there!!!