Pinkman, the WSJ article links to the same photo of the 'window panel' that we have already seen, could be any piece of unrelated floating debris (eg. some large piece of Styrofoam packaging). Until it is retrieved and confirmed as an aircraft part, it's no new information.
A positive search result would likely reveal a debris field rather than isolated pieces, the sea had been calm over the past 2 days.
Also by now looking for any oil slick would be rather futile. While thicker than petrol, aviation kerosene is still rather volatile, a thin surface film of it would have evaporated by now with 30C+ daytime air temperatures.
Last edited by andrasz; 9th Mar 2014 at 15:06.