Tim O'Reilly at O'Reilly radar - Reuters CEO sees "semantic web" in its future:

"What I think does ultimately matter is the ability of professional media to build specialized interfaces and vertical data stores that are suited to their niche, hopefully harnessing data and services from the consumer internet, and mashing them up with specialized, perhaps private, data stores. Put that together with metadata for programmable re-use, and you may really have something."