I liked this video, especially the part where Harry says:
It is like a red pill for the web. When you take it, all you see is triples. The true graph nature of the universe is revealed.
While we are still a bit far away from that red pill, the concept of seeding a little metadata to your web pages to enable a data web is a great idea.
GRDDL, bridging the interwebs? from Marcos Caceres on Vimeo.