This is something new for the Google Mobile App for iPhone. Deep inside the settings of the Google Mobile App, there is a settings for the Voice Search.
Literally, it means that you can search for things by talking into the phone. I have not tried it out as I don’t have an iPhone. However, the video is pretty cool (after the break).
Here is the link to Google Blog for more details. Google called it the Bell and Whistles for the New Year. I think that the application is quite cool. To download it, you will need to access the iPhone App Store and search for Google Mobile Search.
Here is the video of the how to use the iPhone Google Mobile Voice Search.