>Any differences from Zite (now owned by Flipboard)?

Yep, differences in design, approach, and implementation. It offers better recommendations and can do things Zite couldn't.

This is not to discount the groundbreaking work done by the Zite team at the time; the last CEO of Zite is a friend who managed the product well. It's always easier when you've been able to learn what other companies have done well and what they haven't. And we've been able to do things like using Google App Engine for the backend from the beginning, which wouldn't exactly have been possible when Zite was founded 9 years ago (and because of earlier GAE limitations and higher costs may not even have been practical even 2-3 years ago).

As a practical matter, Zite is about to be discontinued with some of its features, in theory, to be eventually incorporated into Flipboard. (The March 5 announcement of the acquisition said they'll be "shutting it down" as early as September 5: http://blog.zite.com/2014/03/05/zite-is-flipping-out/ ) So if you liked Zite, you might want to sign up at http://recent.io