I am here in Pittsburgh, but as a composer, I usually get called in after the shoot! I do know some people though, so I'll ask around and see if anyone's shooting now or soon. A good friend of mine is putting together a project now; if it gets off the ground, it'll be pretty great, but I don't know how close he is (he usually does scriptwriting for other directors).
Some suggestions though: make a flyer saying you're looking to assist on a shoot. Go to Pittsburgh Filmmakers (in North Oakland), and hang it on their bulletin board. While you're there, scan the board for "help wanted" notices; there usually are a few. Do the same at the Art Institute (though usually they're stricter about letting people in; you might need to con your way past a guard or two). Check out the Pittsburgh Film Workers Association (http://www.pghfwa.com/
though they rarely update their site) and the Pittsburgh Film Office (http://www.pghfilm.org/
). They will help you get on a production as an extra or a PA. There you can talk to and meet other local extras and PAs, and dollars to donuts, one of them will be working on an indie project. Do the 48 in the summer (http://www.48hourfilm.com/pittsburgh/)...if
you don't know enough people to start your own team, look up last year's teams on facebook/youtube and ask if you can help next year.
And, as Wombat says, if you can get a camera and some friends together, you're on your way! It's not a bad town for film, really!