Here are two links to articles about the Cline Shale:
From www.mywesttexas.com, Spotlight intensifies on emerging Cline Shale. This article states "the Cline could be the larest oil play in the nation's history," and that Devon is ramping up drilling activity in the Cline.
From CBS7, Shale Oil Formations Bringing More Companies to West Texas. When will the oil boom end? This article talks about "a second oil boom coming to the Permian Basin," and says the "Cline Shale Play is one of the most promising."
It seems that every day, more and more attention is being paid to the Cline Shale.