Hmm...the image may be inaccessible for the same reason the article is. It's at Johns-Hopkins, and since I'm logging on from another University, I seem to have access rights maybe everyone else does not.
Anyway, here's the image again, hosted this time at my site:
If anyone's interested in the text of the article, let me know. But there's no reference to what the original comic was. Suffice to say there is a lot of speculation about how the image (and the Superman legends in general) have homosexual overtones.
Bleh. Personally I think, as Freud said, sometimes a cigar is just a cigar.