Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
FuelFix wonders whether shale energy will be a global phenomenon.
Matt Fix at FuelFix writes: "Given the rapid rise of the US shale gas market, it is not surprising that similar opportunities are being explored with gusto across the globe. Given the size of technically recoverable shale gas already identified, it would seem that a global boom is inevitable….or is it?"
For the rest, including lots of charts and graphs, go here.