New JavaScript based text justification library looks promising. The default HTML/CSS text justification built into every browser has always sucked, due mostly to lack of word hyphenation.
One of the places I’d really like to have good justification is in Ronn’s HTML based man pages. It uses text-align: justify currently, but I’ve been considering making it non-justified because it’s so horribly bad. Compare it to the proper justified / hyphenated text generated by groff when viewing manpages in a terminal. It’s night and day.