I found 1, forgot the name but it couldnt understand anything I was saying. I never wanted one, held onto a envy for a loooong time. Finally decided to try this 1, and oh my god am I glad I waited.
I found a couple of APPS... Speech to text: download "TalkToMeKeyboard" this will allow you to speak and converts your voice to text. Great for Driviing...LOL. Also for hands free playback...download "DriveSafely" this will speak who the text is from and what the text says...
Hope this helps!!
My HandCent SMS will do Speech to Text. Not sure if it came with it or came when I downloaded TTS Service Extended. I sent a text using just voice and it went really well as long as I talked slowly and separated the words clearly. Not easy for a southern boy!