Jed McCaleb, the creator of E-Donkey and the founder of one of the largest Bitcoin exchanges, Mt.Gox, dropped out of Ripple Labs (a company that he is also a co-founder) to 'spend his time looking into new things: man-made surf parks and artificial intelligence'. As was written in an article from Wired:  http://www.wired.com/wiredenterprise/2013/09/jed_mccaleb/

But a video recently uploaded in YouTube (http://www.youtube.com/watch?v=uQ2DCKLHaQs&t=461) says otherwise. In the video, he mentioned that he left the company due to 'disagreements with someone brought on to be CEO'.  

So which is it really?  Maybe we will hear Jed McCaleb's side of the story in full in the near future.