Isle of Wight, VA
This picture was discussed on the Yahoo Eastern Mountain Lion Group and also at the PATC Trails Forum. Although I am a “believer,” I think this particular photograph is of a bobcat.
From some angles, bobcats may look a bit lion-ish. Here’s a photo I took a couple of years ago that is somewhat similar to the one in question. This second photo is of the same cat, obviously a bobcat in this shot.
Buffalo Creek, WV
Also on the Yahoo Eastern Mountain Lion Group, this Youtube video was posted. One theory is that the video is not of a mountain lion, but rather of a large house cat. The family that shot the video seem convinced it was quite large though.