TwitterFone is new private beta service that converts voice to text and then posts it to Twitter in text and audio format. If you want to use it and spare your time, while on go or being busy, you need to verify your phone number with Twitter account. Then, TwitterFone will give you a local phone number to call (in my case is UK) to leave audio message. You have to speak clearly after the beep, then hangup: the audio message you send will be transcribed and then posted to Twitter along with a link to the recording. As you’re limited to 140 characters on Twitter, TwitterFone gives you time limit of 15 seconds on the recording. The service supports English only and is free for now. Users comments here, and this is my test message/tweet.