Been thinking about this topic a lot recently – in particular the use of photos, but also telling real peoples stories. Its always an issue at work, and so I was interested to read about some of the work done by the DFID funded Young Lives programme
The page illustrates their carefully thought through approach, which is worth reading. I like their suggestion (contained in their guidelines on photographing children) that all children who are photographed are given a copy of their image as a souvenir, but I’m still not really clear how informed consent can work – can people who may never have used a computer have any real understanding of what it means to publish a photo on the web?

On a lighter note, another DFID funded research programme has produced a really simple guide to help amateur photographers improve their pictures – anotherĀ  thing well worth reading : photoguide (pdf)