It appears www.sitemapwriter.com doesn't respond to GET requests anymore. Only POST seems to work.
This line tries to perform a GET request using OpenURI#open:
Ping failed for Sitemap Writer: #<OpenURI::HTTPError: 404 Not Found> (URL http://www.sitemapwriter.com/notify.php?crawler=all&url=http...
POST doesn't work for me either. I think this service is just down.
Yeah seems to be okay now...