Werner Vogels has details on the progress of the satellite search for Jim Gray.
Follow this link to find out how you can help the search too.
I’ve gone through about 600 images or so, but haven’t seen too much. A few possibilities, but nothing as clear as the sample boat images they provide. My guess is that after looking at so many waves you’re bound to find more than a few that look like something man-made for at least a snapshot in time.