Industrial Helix wrote:cubfan... not sure what you're talking about. Can you explain more?
Until the 1800's, the form "ſ" was used in certain cases where today "s" would be used. for example, "Rhode Iſland", "Caſtine", "Maſſachuſetts", etc. It's a small point, but if we're trying to go for the late 1700's look, it will be helpful. However, I don't think it's 100% required, considering the confusion it might cause, especially among those to whom English is a second language.
http://en.wikipedia.org/wiki/Long_s is an article about the subject.
http://www.loc.gov/exhibits/religion/f0503a.jpg is an example from 1780. Note especially the words "essential", "possessing", etc. Also note "protecting", which uses a ct ligature.
For typographic ligatures, see http://en.wikipedia.org/wiki/Typographic_ligature