recently announced Voice Actions for Android 2.2+ phones which allow you to control actions like sending text and email's, navigation and finding businesses, call contacts, plus search all by speaking to your phone.
Vlingo: Words to Action does almost the same.
Feeling trumped by Google, Vlingo immediately cut the price on their once $10 app to FREE. For free why wait for Manufacturers and Carriers to update.
Search for Vlingo in the Android Market.