Speech to Text Platforms
AT&T
http://developer.att.com/developer/apiDetailPage.jsp?passedItemId=10700023
An example of this in use: http://www.zukinimobile.com/speech
Google
http://code.google.com/chrome/extensions/experimental.speechInput.html
iSpeech
https://www.ispeech.org/developers
OneTok
http://onetok.com