I often like to get look at different stock image galleries (i.e. sxc.hu), but I never found one that specialized in Jewish and Israel themes until I stumbled upon one today.
Check out www.israelimages.com – really quite a nice assortment of images. Some stuff I couldn’t really find elsewhere, such as
The Western Wall (Circa 1900) (search under pictures->early photography).
Keep in mind that the images (at least the ones I was checking out) are not free, and the cost depends on the way you will be using it (i.e. for-profit website vs. group family gathering). Still, a nice find.