Very very informative interviewers by Moira Gunn of TechNation with Brian Sager, the co-founder of Omnity, a semantic-web-based search engine.
Omnity offers a free service, as part of its effort to bring the benefits of big data (or maybe "big processing") to all. At this point, at least, the results are not thrilling, but this appears to result from limited intake of publications.
The interview as mentioned is informative about search and discovery, about metadata-based search, and about taxonomic cataloging. The interview is worth a few minutes and Omnity is worth watching.