I once considered getting a headset that would type out words that I was saying onto the computer instead of me typing when I started my book, just to help out however decided that I would hate having to clarify words and think about formulating words while I was in the 'flow'. I just wondered would other people prefer speaking to typing?
I've always prefered typing, I think it's just something that has came naturally to me (yet we've all been there, typing very slowly with the index fingers of each hand - one letter at a time!) Though I have always been curious about that kind of software, apparantly there's some good (yet pricey) software out there! It would be interesting to see how you find using it, if you ever choose to!