Hissingsid - 4:20 pm on Feb 21, 2011 (gmt 0)
I've not previously thought about trying to rank on image search and this thread got me doing some research on one of my sites that has a photo gallery.
My site uses a CMS that gives uploaded images a name like 126.jpg this is clearly (looking at my images SERPS) not a good thing. You need a gallery system that allows you to keyword your image name, alt text and caption.
I personally like jquery Galleria which I use but have no idea if it is any good from an SEO point of view.