You can use the following keywords for voice actions
"send text " will send the phrase as a text message to the contact you specify.
"navigate to " will give you navigation instructions for the location you specify.
"send " will send the phrase as an email to the contact you specify.
"map of " will display the map of the location you specify.
"go to " will pull up the browser on the specified website.
"note to self " will save a note for yourself.
"directions to " will give direction for the specified location.
NOTE 1: An Internet connection (Wi-Fi, GPRS/3G, etc.) is required to access this service. Your operator may charge for using GPRS/3G.
NOTE 2: This feature requires Google Voice Search Version 2.0.1 or higher. Please visit Android Market and search for Voice Search so you can install it on your handset.
NOTE 3: This function requires Wi-Fi, GPRS/3G in order to work properly, and usage may shorten the handset's battery life.