I saw an interesting tweet from @philipgreen this morning, that said: I'm speaking my tweets in to my mobile phone still got nothing to say but at least I didn't have to type it -composed with vlingo
So I investigated further, to find that ...
Vlingo is a voice-powered user interface that unlocks access to mobile phone wireless data services. vlingo for iPhone™ and vlingo for BlackBerry smartphones allows users to speak into their device and have many popular applications carry out their respective functions. This includes dialing your phone, sending an email or SMS, creating and saving a memo or task, opening a web browser and performing a web search, composing a social-networking status message and more.
Take a look at www.vlingo.com/