Our updated Search "We flipped the switch last week and have been testing it ever since. Compared to the last version of our search engine, this one is blazingly fast to return results, the results are much more specific to what you're looking for, and it is constantly keeping up to date on over 1 million pages with Creative Commons license info in them."
What I like, is the "explain" feature. It looks like the Nutch API is specific to Creative Commons and isn't available for general RDF use. Nutch has a bunch of other plugins similar to resolvers in Kowari like mp3 and mbox.