To see how it works, go to: http://www.google.com/intl/en_us/mobile/sms/ and enter a sample query. The picture here is a simulation of the text message response I would have received on my cellphone for the query "Detroit Tigers."
Suppose I needed to know the definition for ubiquitous. My query is "define ubiquitous" and the response looks like this:
Fascinating! My head might explode!