I've found that software that relies on sound is problematic. Problems include:
(DeleteWhenRead: This was originally ComputerSoundUseless. I added a comment questioning whether the above amounted to uselessness, but someone else felt more strongly about it and moved the page to ComputerSoundMildlyInconvenient, which seems like a minimization of the original poster's (valid) complaints. So I've moved it to the more-neutral ComputerAudioUsability, partly because the original page name looks too much like 'Computers Sound Useless'. Some days I'd agree with even that sentiment, though... --TimLesher
Talking of relying on sound... did you know that WindowsVista has SpeechRecognition??