Whoa! I was just thinking that I need something like this for a smart RSS aggregation agent I am designing. An open source search engine that I can completely interface with via XML-RPC is what I need to build indexes and tables to make my agent very smart, very quickly based on key words and phrases the agent's owner enters. What would be even better is if Nutch has a special flag to search only RSS feeds.
This post brought my attention to Nutch. Thanks, Dave.