Vox Media (behind The Verge, Polygon, SB Nation etc.) announced in January they're working on something similar [1]. Their jobs page [2] is listing a few positions under 'Project X'.

Worth keeping an eye on.

[1] http://www.theverge.com/2014/1/26/5348212/ezra-klein-vox-is-... [2] http://jobs.voxmedia.com/apply