Fracking Information
An extensive online database that links "...the complex of oil-and-gas-allied academics, think tanks, consulting firms, and public relations shops producing misleading and flawed research to win public and political support for hydraulic fracturing." Created by the Public Accountability Initiative, that is all about "...researching and mapping power."
FracTracker: Colorado Oil & Gas Maps
These data collected by FracTracker, which is based in Pennsylvania, provide a high level look at drilling activity across the state, using a custom "map viewer" that allows you to zoom in on specific areas.