You can subscribe to this wiki's Atom feed and get either just the headlines of the pages that change or the entire page.

<%- if @rss_with_content_allowed -%>
• <%= link_to 'Full content (Atom 1.0)', :web => @web.address, :action => :atom_with_content %>
<%- end -%>
• <%= link_to 'Headlines (Atom 1.0)', :web => @web.address, :action => :atom_with_headlines %>