what it is: magnum p.b. (photo blog). get it, like magum p.i.?
where i found it: around
Now here's AN EXCELLENT BLOG which offers ongoing slideshows based on current events and new publications from the Magnum, the imposing photography collective.
While we're on the subject of photography, HERE'S A SITE that offers 100 mostly enjoyable ways to spend a day experimenting with your camera.