I rarely post, but there has been much recent literature on this topic that
should also be shared here. The feel of the room at SemTech Boston and a
recent review of Semantic Technologies on O'Reilly have suggested that some
technologies ( including Opengraph, OWL, triple stores) may not be not the
answer, but the power is in the Linked Data -- that is understanding and
improving the relationships in the text, data, image, user experience and
sharing these with other applications.
Check out this blogpost on O'Reilly
It seems semantic web/social media might be moving towards a more practical
view where there is wider understanding of the value in ontologies,
taxonomies, common vocabularies and metadata, as a critical part of the path
towards scalable technologies to share, discover and improve information,
independent of what technology is used for machine-level implementation.
(and much easier to implement).
Organizing concepts leads to clear thinking