The WSJ has a good article on the potential of shale gas. "What has become known as the "unconventional-natural-gas revolution" has turned a shortage into a large surplus and transformed the natural-gas business, which supplies almost a quarter of America's total energy. This revolution has arrived, moreover, at a moment when rising oil prices, sparked by turmoil in the Middle East, and the nuclear crisis in Japan have raised anxieties about energy security. Government and producers alike have turned their attention back to domestic resources."
Read it.