Update: I just checked the voice/speech to text on 2.1 and sadly, there is no change. Though voice search works for dialing while driving, I was hoping for a tweak to the voice dialer to make it auto dial the number. As it stands now, when you say 'Call Dad' it comes up with the contact very quickly but you must press ok to dial. Voice search takes a moment for the search to complete and it is more picky about what you say. For instance, for my Dad I have only a home number but for voice search I must say 'Call Dad Home' whereas Voice Dialer I can just say 'Call Dad'. The latter spoken into the voice search pulls up the right contact but does not auto dial.