Related How Tos
The Activity plugin lists pages found in sitemaps retrieved from federated wiki sites mentioned on pages you have visited. These sites comprise your search neighborhood.
Wiki takes a few seconds to load each sitemap so it can get behind. You can see wiki working at this by noticing the flags in the web page footer.
The server dates the pages as the sitemaps are loaded. More recent changes can go unnoticed until the sitemaps are loaded again.
See GitHub for plugin source.