Ambigrams, DaVinci

Ambigrams seem to be popping up everywhere lately. You know, ambigrams—words that spell one thing one way and another in a different direction. They've been showing up on t-shirts, on Boing Boing, and in discussions of the new DaVinci code movie. John Langdon's title sequence isn't being used in the film, but it's quite interesting to read about (FontShop has a bit of info about the actual titles, which were done with the Penumbra typeface). Meanwhile, if you feel you don't know enough about ambigrams, trusty Wikipedia has a nice explanation, complete with a list of ambigrams that have been used in logo design. Once again, something that could have made typography class a bit more interesting, but never mentioned in art school.
pictured: one of John Langdon's many ambigrams