This 1863 image from the Wellcome Trust illustrates a distinctly vampiric set of "Syphilitic malformations of the permanent teeth" -- makes you wonder if the visual image of the vampire was inspired by the widespread horrors of untreated syphilis (for an exceptionally visceral window into a society wracked by untreated syphilis, have a look at the Mutter Museum's display of syphilitic skulls).
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.