Some of that is already going on.
Dow sees shale gas renaissance for US chemicals sector
http://www.icis.com/Articles/2011/06/08/9467658/dow-sees-shale-gas-renaissance-for-us-chemicals-sector.html
Prospects for North American petrochemical producers improve
http://www.icis.com/Articles/2011/03/21/9444238/prospects-for-north-american-petrochemical-producers.html
But if prices raise too soon based on high export prices, that infrastructure will never be financed or built.
We need the value-added jobs far more than the commodity export revenue.
Wishful thinking perhaps, but I would love to see every BTU of that gas burned right here to revive industry rather than seeing it exported to fuel other nation's growth.