I’m still working on YodaQA and there is quite some interest in it in my mailbox. One thing leads to another and our startup Ailao already has a few first customers, we work together on various related semantic NLP / search projects.
In YodaQA, we have a much neater web interface as well as a mobile app as the natural way to interact with a QA system is using your voice. Plus, on a limited domain (movies), we are getting pretty close to crossing the 80% mark for accuracy on simpler questions, entering the “magic zone” where people might start really trusting the system. A few essential blocks for that are still in the pipeline, though.
I’ll try to post a bit more about YodaQA and other work we are doing in the coming weeks / months (as well as some of my hobby projects, of course).
For a course of Jan Šedivý, I prepared a presentation on building apps around the semantic web and linked data. See it here for an intro to the tech, it also includes two silly web mashups that might be inspiring.