Flight information from Google SMS

With Google SMS, getting real-time flight information is as easy as
texting a message to your friend. Simply text message your flight
number to 466453 ("GOOGLE" on most mobile devices), and you'll receive
a text message right back with the status details of your flight. If
you're looking for more general information, you can text message the
name of an airline, and you'll receive a message with the main phone
number to call. This free service is available for flights departing
or arriving in the U.S.
http://www.google.com/sms