I've just started my adventure into Voice Recognition and VoiceXML Development. This applies to not only automated phone systems (ie. 'To reach the Accounting Department, press 1 or say Accounting') but can also translate into IM bots (text input recognition). This technology has advanced to allow some pretty complex user interaction.
I'd be interested to hear from any Usability Experts how they would approach interface testing to gage user experience. I know with visual interfaces where a user interacts with mouse clicks there is a certain process, but I'm not familiar with anything for voice interfaces.
I don't want to create voicejail's from hell :)
I'd appreciate any feedback!