Again with full disclosure up front: this is a venture in which I am personally involved:
A few weeks ago in Washington DC, my partners and I announced the formation of CircLabs and the intent to develop a product "code-named" Circulate, incubated at the Donald W. Reynolds Journalism Institute at the University of Missouri. But the announcement stopped short of an explicit description. We've now unveiled the CircLabs Inc. website with more details about our plans for Circulate on the About Us/FAQ page.
Circulate is a holistic, user-centric solution aimed broadly at sustaining journalism in a digital world, with specific relevance to the ongoing exploration of paid-content models for newspaper Web sites. Circulate enables experimentation with subscription and per-item user charges, but as a user-centric content discovery tool, Circulate goes well beyond the announced features of other systems that have been proposed in that space.
Circulate will be rolled out in phases. Initially, it will be a browser add-on that you can have always handy as you move around the Web. Circulate will function on multiple platforms to allow full portability: a mobile application is planned, possibly first as an iPhone application, along with user start page and e-mail notification options.