Twitter founders Biz Stone and Evan Williams are planning to revive Obvious - the technology incubator that led to the creation of Twitter.
It'll mean a big step back from Twitter, although the pair will continue to advise on strategic issues. Williams had already given way to Dick Costolo as CEO, in a move designed to help monetize the site. They'll be joined by Jason Goldman, who left Twitter last December.
Obvious was created about six years ago as a mechianism to help buy back a failed start-up - which included a project which later became Twitter - from investors.
"Although it was incubated for about half a year at Obvious, Twitter was now its own fast growing company, and it demanded all of our attention," says Stone.
"The company Ev had created started a couple projects, but ultimately faded out of the picture. So, for more than five years our attention was focused on Twitter as it grew from a 'useless' toy to a particularly informative global phenomenon with amazing potential."
Stone doesn't say exactly what he plans to do with Obvious. There's a pretty comprehensive mission statement - "The Obvious Corporation develops systems that help people work together to improve the world."
The only other hint he adds is that the company will be used to 'work on solving big problems'.
He says he also plans to do a bit more charity work, helping schools, nonprofits, and company advisory boards as well as The Biz and Livia Stone Foundation.