You're right, we'll make it more clear on the landing page. A full out-of-the-box integration with some voice recognition engines (we love CMU Sphinx, open source) is in our roadmap.
> Also, let me try it!
We purposely didn't provide a "end-user" demo (something that would look like chatting with Siri) because we want to focus first on the developer experience, when they configure Wit to understand their very own end-users intents. You can require an invite and try this in less than 5 minutes.