Search for related pages
From MozillaZine Knowledge Base
It employs Javascript to search Google for related links on the current page. Note that this will only work if Google has already indexed the site. To add this to your bookmarks, bookmark this website and change the location to:
javascript:document.location.href="www.google.com/search?q=related:"+document.location.href
You can edit the name and even give it a keyword. Bookmarklet code kindly stolen from clav.