DrupalCon, was very successful for the SemanticWeb.
I was very surprised by the attendance of my talk - around 70 people - and the group meeting afterward had some very knowledgeable, motivated, and interesting people. I am really looking forward to fleshing out things here.
My presentation, on http://semanticsearch.org and http://durpal.org/project/semantic_search was really fun for me. There's some really great stuff going on, and a lot of interest. My work will be to make the Semantic Search module development fall into line with what this group and other groups need from a Semantic Web application, and some of that was covered at our meeting after my talk.
Stephan, Thomas, and I also met after the conference and I got to see Stephan's presentation on "SIOC" (pronounced sh-o-k) - great work.

Comments
BTW - /. could use some help with what is Web 3.0
http://slashdot.org/article.pl?sid=07/09/24/192204
audiofiles at archive.org
hi,
i have / now successfully / uploaded the audiofiles to archive.org with the tag drupalconbarcelona2007 .
at the moment i can not connect ot archiv.org, so i can not post the link here.
Have fun with it.
Thomas
Drupalcon Barcelona recordings
Just to provide a direct link, the recordings Thomas mentions above can be found at:
http://www.archive.org/details/semantics_in_drupal
http://www.archive.org/search.php?query=subject:%22drupalconbarcelona200...