I was reading Lesk’s Understanding Digital Libraries the other day and, when I came to the chapter where he discusses keystroking vs. scanning, was reminded of the Lacus Curtius site:
This classical studies page is host to many hard to find primary materials, all of which have been typed by hand (!) by the site’s creator, Bill Thayer. His primary reason for doing it this way was accuracy, but he found that it enhanced his knowledge of Latin, too. Of course, it could also be that he’s completely mad! In any event, if you want to look up Frontinus on the web, his site is the place to go.