i'd follow my nose from here, an image i discovered yesterday while trying to find the phone number of my neighborhood grocery store:
read the comments on the flickr page.
Of course, that lead me to here, a slightly more academic (Arty) conversation about Gursky's picture.
Jorg's got a nice one here.
But of course, it's the auction price that draws attention, isn't it?
But I think this one's my favorite.