I decided to make this after seeing that wit.ai's official ruby client was only able to send messages to wit ai and get the json response back. I made an entire library to request things from wit.ai, create bots to respond to intents, ect.
Does it support speech input? I have looked at using the microphone/speech input capabilities in Chrome for web apps, and I am interested in support for that, understanding that your client library and Wit.ai calls would be sever side.
Sadly, no. Ruby is not normally used for client side apps, so I didn't decide to spend time on that (like wit's new official library). You could easily modify the library to send audio files, though. Sadly, you still have the problem of getting speech from the user, normally a somewhat difficult process that this gem alone couldn't take care of.
But, if you'd like to send a PR for sending audio files, I'd very much love to accept it.