Well, I can't find the image they're talking about because the websites are down or something.. maybe it will work later on.
In any case, this is what all the commotion is about:
"The famous fresco is already the focus of mythical speculation after author Dan Brown based his "The Da Vinci Code" book around the painting, arguing in the novel that Jesus married his follower, Mary Magdelene, and fathered a child.
Now Slavisa Pesci, an information technologist and amateur scholar, says superimposing the "Last Supper" with its mirror-image throws up another picture containing a figure who looks like a Templar knight and another holding a small baby.
Websites www.leonardodavinci.tv, www.codicedavinci.tv, www.cenacolo.biz and www.leonardo2007.com had 15 million hits on Thursday morning alone, organizers said, adding they were trying to provide a more powerful server for the sites."
It's just interesting how this kind of stuff can generate that much interest, though I guess if you really believe in one story as opposed to another, it can evoke a strong response.