Photoshare

Photoshare is an excellent photo sharing site for anyone in public health or health education. They have over 15,000 photographs in categories from "abortion" to "youth programs". There is no fee for non-commercial use. If you would like to add to their collection of documentary style photos, they will make sure you get the photo credit. There is also the Photoshare Blog which has acticles about interesting public health projects, their photo contest and points to interesting articles.

I found this via a non-web 2.0 source called AVERT.org which is the most comprehensive website on AIDS/HIV that I've ever seen.