Marcellus Shale is here and there's no turning back, but an informed populace is the best defense against rapacity and greed, and that's where Josh Fox's Gasland comes in.  It's more the first word than the last word on the subject, but this is a subject that is worthy of plenty of attention and this is a good place to start.   Here's the official description:  "The largest domestic natural gas drilling boom in history has swept across the United States. The Halliburton-developed drilling technology of "fracking" or hydraulic fracturing (Copacetic Note:  hydraulic fracturing was actually developed by George Mitchell of Mitchell Energy; not sure why the makers of this film think it was Halliburton...) has unlocked a "Saudia Arabia of natural gas" just beneath us. But is fracking safe? When filmmaker Josh Fox is asked to lease his land for drilling, he embarks on a cross-country odyssey uncovering a trail of secrets, lies and contamination. A recently drilled nearby Pennsylvania town reports that residents are able to light their drinking water on fire. This is just one of the many absurd and astonishing revelations of a new country called GASLAND. Part verite travelogue, part expose, part mystery, part bluegrass banjo meltdown, part showdown."  Here's the trailer.  Bonus features?  Yes:  this DVD contains 45 minutes of "never-seen-before" bonus footage.