There are, of course, infinite write-ups of the debacle of the Palm Beach County ballots during the 2000 presidential election. This one gives a nice overview and illuminates the importance of the Invisible craft of information design. http://www.asktog.com/columns/042ButterflyBallot.html
A terrific video outlining the history of typography.
The folks at idsgn have put together a short history of Helvetica Man, including links to the complete set of AIGA symbol signs commonly used in wayfinding.
Montage of different parking lot wayfinding signage via The Awl