I've just added some more names and references to my list of famous synaesthetes or possible synesthetes, bringing the total up to a nice even 50 famous names. Don't overlook it's potential utility as a collection of bibliographies/reading lists about individual famous people, if you are doing some type of research or school project or are simply curious. See it here:

http://incorrectpleasures.blogspot.com/2009/01/famous-synaesthetes-or-possible.html