Well,
a) my son made it his personal theme when I let him play with my compact digital on the Folklore Festival in town last month and only photographed other photographers (including his mom),
b) those TPF members who met in England last weekend spent MOST OF THEIR TIME photographing each other while taking photos, so there are PLENTY of photographing-the-photographer to be seen, and
c) I photographed the official photographer at the bicycle race through Thaxted on that above mentioned weekend, too.
Oh, sorry, posted this before I got round to saying that I like your photos of the photographer.