Just to announce that a Calibre plugin (by
SauliusP) for adding hyphenation to AZW3 books via soft-hyphens (that is, putting &
shy; HTML entities in place between syllables) is now available:
here. It works for sure (obviously even without jailbreak) on KT and KPW but I guess it should work on any model with a firmware supporting the MOBI8/AZW3 format.
Maybe this could be mentioned in the opening post of the thread?
The plugin uses OpenOffice/LibreOffice hyphenation dictionaries. Hyphens can also be removed. At the moment it seems to work well for ePubs (which could then be converted to AZW3) while it could have some side effect directly on AZW3.