Changing Your Filesystem's Locale?

dybdahl asks: "Now that Red Hat has changed the default character set to be UTF-8, none of the existing filenames that included local characters like æ, ø, å, (Denmark) are handled correctly by Konqueror or can be seen correctly with "ls" in a shell. Is there a tool out there that can convert an ISO8859-1 ext3 filesystem to UTF-8?"