One star shy of Great!
Im rating Wikibot 4 stars for its overall great layout and usability. It improves upon Safari browsing in many obvious ways.
Here are suggestions to help Wikibot gain that last star:
Have the opening page be user defined. eg: User Guide, Main Page, Last Seen, etc.
The desktop User Guide should be desktop specific. (Same for iDevice Guide.)
Change the Main Page shortcut to Cmd-Shift M (more memorable and M is not in use)
Allow Sidebar font size to be enlarged by user.
Bookmarks and Favorites seem to be the same so pick one name and go with it.
These suggestions will only improve upon an otherwise excellent app.
Seer360 about
Wikibot — A Wikipedia Articles Reader, v1.5