1 - Using the top menu, select the type of voice search you want to perform (phone number, location on a map, word to google).
2 - Then, push the only central big button. Spell a phone number, or an address, or a word to google.
3 - If what has been recognized matches what you've just said, confirm that you want to launch the phone call, or the geolocation or the google search (depending on your choice in step 1). Else, simply cancel the phone call.
I tested this application on an HTC Hero.
Now, Android Hands Free allows :
- to place a phone call you spelt
- to locate a town, or town + address in google maps. Simply say : "Toronto". Or : "Toronto Spadina avenue"
- to lauch a Google search on what you've just said.