Trends

This new addition by Google is fantastic.
They had a similar product in the Zeitgeist but now they offer trends on a daily basis and on specific search terms.

Im sure they can drive out half the market survey firms if they allow customization and info at a finer grain. Also they can use it to potentially generate huge amounts of revenue.
Obviously they wont let out all the information they have, but in a few areas it might be worth it.