Yahoo!’s new RSS search site was introduced to the public domain this morning. Yahoo! RSS Search is no longer exposed outside the firewall so don’t be surprised if you are redirected to Yahoo! Search when you follow the aforementioned link. This early version of a future Yahoo! search component appeared to restrict searches of Yahoo! Search’s index to only include content published as a feed. I presume Yahoo! will use RSS as a generic term referring to feeds including RDF, RSS, and Atom.