Browsing around the web yesterday, I came across C|net's The Big Picture. They've made a semantic map of all news stories and the topics that each story belongs to. Apparently the technology comes from LivePlasma, which does semantic maps for multimedia content.
http://news.com.com/2104-1008_3-6041758.html?tag=st.bp
http://www.liveplasma.com
Surely the SSD should be able to make something of this kind for user data.
