I've upgraded the ikiwiki-nav plugin so that it now supports:

  • Wikilink autocompletion through omnicompletion.
  • Jump to previous/next wikilink.
  • Open the file corresponding to the wikilink under the cursor in the current window/a new window/a new tab page.
  • Create the file corresponing to the wikilink under the cursor in the current window/a new window/a new tab page .

You can download it from here