I recently saw a surge of traffic that I traced back to ranking decently on Google Images. Looking into it further - seems some other stuff has bounced around a bit in the last couple of weeks. I remember when Google Images didn't update for months - so have things changed ... or did I just catch a couple of "data pushes"
Yeah, I noticed that google indexed most of my site (in sig), even up to pics from a week or two ago. Before it wouldn't grab something for a few months. The new PR 6 might have helped though ... not sure.