Here's some info from Google's own site about a product called Google SMS. It comes from Google Labs, the section of Google that allows users to try prototypes of programs that "aren't quite ready for prime time".
Go directly to their site at http://www.google.com/sms/ or continue reading below.
What is Google SMS?
Google SMS (Short Message Service) enables you to send queries as text messages over your mobile phone or device and easily get precise answers to your questions. No links. No web pages. Just text — and the information you're looking for:
Get local business listings when you're on the road and want to find a place to eat.
Obtain driving directions to get from point A to point B without having to ask for directions.
Find movie showtimes and theater locations of movies currently playing near you.
Check weather conditions and 4-day forecasts to plan your day.
Get quick answers to straightforward questions.
Study the latest stock quotes and stay on top of the market.
Compare online product prices with ones you find in retail stores.
Look up dictionary definitions to expand your vocabulary or prove a point.
How do I use it?
Enter your query as a text message. See some sample queries.
Send the message to the US shortcode 46645 (GOOGL on most phones).
Receive a text message (or messages) with your results, usually within a minute. Results may be labeled as "1/3", "2/3", etc.
To get Google SMS help info sent directly to your phone, send the word 'help' as a text message to 46645.