Speech->Text conversion is really harder than simple Voice Recognition. There are not a lot of companies doing this right now the most famous being Nuance and G

Speech->Text conversion is really harder than simple Voice Recognition. There are not a lot of companies doing this right now the most famous being Nuance and Google of course. Nuance has been acquiring a lot of companies the last three years that were doing a lot of improvements to the technologies (SVOX, VLingo, etc.) and powers Siri technology.