My "Judgement Day May 21 Billboard Over Budget Copy in Cambridge, MA" photo makes the Slate.com website.
Slate calls it "clearly photoshopped." It isn't, but it is post-processed (with the Camera+ iPhone app) heightening the contrast on the clouds. It's a cellphone photo, so it obviously won't stand for much post-processing, but those clouds were really there. That's pretty much been our weather around here for as long as I can remember. It's photo #2 in the slideshow. I'm also credited with the next image, too, but I've never been to Lebanon, so obviously that's a mistake.
I guess we'll find out this weekend if Mr. Camping's math and biblical scholarship skills have improved any since 1994.