Stéphane Corlosquet talks about RDF in Drupal's future and mentions SCF in a short podcast recorded at DrupalCon Washington DC in March.

Stéphane, who worked with the SCF team for five weeks around DrupalCon, is organizing an RDF-in-Core sprint at DERI in Galway, Ireland, to push semantics in Drupal as far as we can.

logistics: http://groups.drupal.org/node/21469
donations: http://drupal.org/node/443824

People who cannot attend can also make code contributions, perhaps starting in advance by tackling still extant issues of the larger project of moving CCK fields into Drupal core (see the Fields in Core Drupal group).