Google Sets look rather interesting. Go to the sets page, and type in "Dave dee" and "dozy" into the first two boxes. Click the "small set" button, and the set is filled out to include "Dave Dee", "Dozy", "Beaky", "Mick" and "Titch" (who are an obscure 60's band)
Type in "Kennedy", "Lincoln" and "Reagan", and get a list of 13 other presidents' names. I tried putting in random terms, but it seems that "fish", "Elvis" and the "Magna Carta" don't have quite enough in common to form a set.
At this particular moment I have no idea what use this technology will be put to, but it's still a really good example of the cool things that you can do when you've got such a gigantic store of data, and a lot of smart people looking for new things to do with it.
