Tony,
All sorts of reasons spring to mind. Some people may have wandered off to the new forum (what happened to that post -- can't find it again?). I have been terminally depressed ever since I discovered that Kodak has stopped the Photo CD service (well, maybe not terminally, but wondering what do do next). I've been trying out a new camera for light travel (Voightlander Bessa-R with 15mm f4, 35mm f1.5, and 70mm lenses) and while it is a great (GREAT!) little camera with truly wonderful lenses, I'm still trying to get used to a rangefinder so about a third of my images are out-of-focus.
And finally, I just have not been taking many people shots lately. Photographs with people in them, yes, like the one shown here of German commuters starring at a television screen on the central station. The funny or slightly surreal thing is that they'll stand and watch for half-hours at a time, but the screen only ever shows adverts for the national railways (DB). Bizzare.
Anyhow, how about this: everybody please post their latest image with people in it, even if it is crap like mine, to get a little traffic and discussion going. Also suggest what you would like to see in the forum.