Here's a serialization of the ConceptualModel (as represented in EchoExample) as RDF. It uses only existing RDF vocabularies - with the exception of the 'Excerpt' class, which I've added into the 'content' namespace for the purposes of this example.

Using mainly pre-existing vocabularies for Echo is an interesting notion and is not unlike the decision to use pre-existing standard hardware for the IBM-PC architecture, which was key to the PC's success.

For future reference : the [WWW]OCS vocab has some good terms for blogroll material