Many technorati will refer to Web 3.0 as the arrival of the “semantic web.” The semantic web is something Tim Berners-Lee has been spending quite a bit of effort pushing forward as a new way to find, deliver and use information on the ‘net — and essentially refers to meaning-based information where the context and content are both evaluated to deliver more relevant results. Hakia.com is a “meaning-based” search engine which has launched in beta this year. From their website:

“hakia is building the Web's new "meaning-based" (semantic) search engine with the sole purpose of improving search relevancy and interactivity, pushing the current boundaries of Web search. The benefits to the end user are search efficiency, richness of information, and time savings. The basic promise is to bring search results by meaning match - similar to the human brain's cognitive skills - rather than by the mere occurrence (or popularity) of search terms. hakia's new technology is a radical departure from the conventional indexing approach, because indexing has severe limitations to handle full-scale semantic search.  hakia's capabilities will appeal to all Web searchers - especially those engaged in research on knowledge intensive subjects, such as medicine, law, finance, science, and literature.”

On the web at www.hakia.com (they also have a blog discussing the development and evolution of their product: blog.hakia.com)