AJAX? Maybe. Tagsonomies? Not yet. Social networks? Not yet. Blogging and Syndication? Definitely
Hmmm… Stephen Downes said so much ealier: RSS is the Semantic Web. Tim Bray would probably say that Atom is the Semantic Web. Who cares, the message is the same. If there is anything transforming the web right now, it has to do with blogging.