MacSpeech today announced the availability of iListen 1.6.3, the latest release of the company’s speech recognition software for Mac OS X. Version 1.6.3 provides Mac OS X 10.3 (Panther) compatibility and several other improvements that provide a more consistent user experience when issuing voice commands. The company notes that all iListen registered users who intend to install Panther on their computers will need to install this update before they can use iListen with the new version of Mac OS X.