Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.
Ive been interested in speech recognition with Dragon and IBS's sytem for a long time. However 90% accuracy still means a lot of slow error correction and Ive still to be convinced. Perhaps Windows Vista will provide the technology to make this input method mainstream.
http://msdn.microsoft.com/msdnmag/issues/06/01/speechinWindowsVista/default.aspx