It doesn't look like it's spidering permonks any more. I searched for some recent nodes, and google doesn't have them indexed. Try searching for the parent node, for example http://www.google.com/search?q=site%3Aperlmonks.thepen.com+thepen. Google returns hits only for older nodes, and thepen.com redirects to perlmonks.

It was a great service, and I'll miss it if it is gone. Thank you blakem for all you've done.