I haven't seen a session proposed on Drupal and the semantic web yet, so I am just suggesting to have one. Please see this as a mark of interest for this topic rather than as a formal session proposal: I am relatively new to Drupal, feel I understand things such as CCK, Views, RDF and SPARQL pretty well, but not quite well enough to give lectures on them :-)

I am currently testing Tattler and OpenPublish, two Drupal installations distributed by Phase2 Technology, aimed at building semantic Drupal sites. Tattler is more oriented towards interest tracking and OpenPublish towards ordinary publication. Both use the Calais API for entity extraction over articles pulled by RSS or added by site users. Both use RDF extensively. I am exploring how to merge Drupal taxonomies and Calais terms and how to build views based on such merging.

I'm also interested in exploring how these RDF sentences can be connected to Linked data entities and am planning to look into the RDF-CCK module for this, as soon as I get comfortable with Tattler, Openpublish and the Calais taxonomies. See: "Produce and Consume Linked Data with Drupal!". And the Evoc RDF external vocabulary importer module.

Drupal7 has been announced as a major Linked Data client. What does this mean?

More generally, this session could discuss different approaches towards including faceted search in Drupal sites. I've been reading about (but haven't tested yet) the Acquia Search module, based on Lucene/Solr. There is also the EXHIBIT module, which "allows rich visualizations that can be searched, filtered and sorted using faceted browsing". (See Josh Huckabee's tutorials).

MOAT and semantic tagging within Drupal is also something that I would like to be exploring soon.

If anyone else is interested in these or related topics, I'd be very interested to meet and discuss. And if several people are interested, an informal session might be a good way to get together. As you can see, this is still a pretty open session and I'd be happy to have it include anything that relates to semantics (semantic web, semantic search, semantic tagging, etc).