A page on the Distributed Proofreaders project advises people who are trying to find typos in scanned and OCR'ed texts to try DPCustomMono, a font specifically designed to make it easy to catch common OCR errors. Distributed Proofreaders are volunteers who check out a page or more of scanned text from the Project Gutenberg archives and check it for typos, improving the quality of the text. DPCustomMono's characters are designed to maximize the difference between ones, lower-case ells, and upper-case eyes, as well as other lookalike glyphs.
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.