"(...) tagging system is not "controlled" in this sense (...), but I'm wondering whether its web-scale nature can provide some benefit that one would not expect."
"(...) has the most power and value in vertical search-style app.s, where a community of experts contributes to a pool of content that is then rated by other experts, assuring that the best available content is recognized and becomes readily available."
"In folksonomies (...) we get to discover content based on who is tagging it. This is powerful because now we can judge content in terms of who (...), and not just how relevant it might be to some algorithm that doesn’t take into account who-knows-who."
"Here we describe our "wish list" for the ideal search engine, explain the need for the specific features and examine whether the currently existing major search engines (...)"