Here is a picture of an iceburg at the surface, both under and above. It just doesn’t look real to me. I received it through e-mail.
http://www2.sis.pitt.edu/~samuelj/tipoficeberg.html
The lighting looks different underwater than above.
Fake. Where would the lighting beneath the iceberg be coming from?
Scr4, even with unpronounceable nick, is my new favorite poster… 
well, who’da thunk “snopes”? not me, that’s fer sure
I knew better than to trust an e-mail.
But there are Nigerians out there who need you to help them get their money!
<hijack>
Not just Nigerians anymore …
See http://www.wired.com/news/business/0,1367,53115,00.html
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It’s an impressive photograph, if real, and I’d be curious about the technique, though I think a composite image is more likely.
The size of the iceberg doesn’t strike me as particularly impressive, though. 300 million tons? So? That’s 1km x 500m x 600m of water. Compared to size of the oceans, it’s a drop.
Okay, so it’s a composite (that’ll teach me to speed-read the thread). I remember one of Isaac Asimov’s essays in which he describes overhearing a conversation on some Arctic cruise or whatnot in which a woman says to her companion “…and whats so unusual is that only one-ninth of that iceberg is visible. The rest is underwater.” Asimov reports that he interrupted,telling her that the really extraordinary fact isn’t that eight-ninths is underwater, but that one-ninth is above! Since virtually all matter increases in density as it gets colder, the ice should sink. But that unusal fact that water becomes less dense is why an iceberg floats and plays a major factor in the evolution of life on Earth.
Isn’t that scary though? Like an x-ray of a big icy tooth!
It was pretty freaky.
I noticed someone else making mention of Isaac Asimov on SDMB. Glad to see the we are in such good company. 
Boy, Asimov sure knew how to kill a conversation.
Never trust anything you read online.