The application-formerly-known-as the RSS Validator has updated to include support for the format-formerly-known-as Echo.
Now that there's an easy way to validate feeds, an even easier way to create your own -- Tristan Louis's RSS2Necho converter -- and (limited) support for the format -- Jeff Licquia's Echo patch for the Straw news aggregator -- Sam Ruby has every reason to believe we're getting closer to "rough consensus and running code."