The WordIndex+ and PageIndex plugins (unlike the other page list
returning ones like SearchPages and UpdatedPages) can utlize this
plugin to output a pretty dictionary like listing of pages.
prev << "appearance/listpages_tbl"
next >> "appearance/title_calendar"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.