A very quick technical overview of what's in a tabbed river.
First, a river is a list of items in reverse-chronologic order from a collection of feeds, also known as a subscription list.
Feeds are RSS 2.0, 1.0, 0.9x or Atom 1.0.
The rivers are in a new JSON-based format. Example.
I would like to see others build on the JSON format, providing new flows, and also providing new user interfaces.
A tabbed river is a collection of rivers, presented in a tab format. I'm using the Bootstrap Toolkit for the tabs.