The Semantic Web takes shape, with Twine
This one is worth waiting for: Twine. Still in private beta, at its most basic it is shared bookmarking service. It blends additional concepts from newsgroups, forums, social networking sites, online databases, and wikis. There's a lot of semantic Web theory (and technology) underneath the interface, which still needs to evolve a bit, but even in this early stage it's a compelling product. (Webware, 7 maart 2008)