Looking through my server logs, I notice every so often that someone has tried to search Find That Feed for a URL like “http://www.theshiftedlibrarian.com/rss.xml”. Since Find That Feed is indexed by title words, no results are ever returned. Also, recently a colleague asked, “is there a list of weblog feeds in the such-and-such domain?” Then it hit me, this is a job for the Share Your OPML SDK. The result: URL Sieve.