Let's say you are so busy, you don't even have time to type in your Twitters. Then you might want to take a look at TwitterFone, which lets you, literally, phone it in. You talk. It Twitters.
I tried it and found voice recognition surprisingly good. It got my name wrong, but I've been called worse. I suspect that TwitterFone is using human-assisted voice recognition (see ReQall), which would not be an untenable strategy if the product actually generated revenue. And on that part of the equation, I'm stumped, unless TwitterFone is getting a per-call bounty from phone carriers.
The service doesn't let you preview its transcription of your voice before it posts your Twitters. That means, in spite of its good transcription performance, you may be surprised to see the words showing up in your name. Still, putting an approval loop into the process would defeat the purpose.
TwitterFone also posts the audio of the messages it transcribes, which makes it a bit like Twittergram.
Who needs it? God only knows. But there it is.
TwitterFone is in private beta. Click here to get on the waiting list.