A key idea of the semantic web is reusing other people's URIs - this reuse forms interconnections between different RDF data stores. The problem, as I see it, is that while URIs are unique, we will end up with a situation where (as an example) there might be thousands of URIs for NewsItem. The Swoogle semantic web search engine is useful for finding already existing URIs - a good first step toward reuse.

Swoogle will return results using their type of 'page ranking'.

So, we need two things to accelerate the adoption and utility of the semantic web: web sites must start to include RDF and this included RDF must reuse common URIs for concepts and instances.