Larva Labs' Intelligent Home Screen is a home screen replacement for Google Android devices that provides an information stream or feed.
It divides the stream into 2 panels: private information on top (messages, calendar events) and public information on bottom (stock quotes, news). It provides color-coded category markers, and a draggable menubar that allows the user to selectively change the volume of information between top and bottom lists, and when pushed to a single end, provides focus on that category. A multi-click toggle on the right icon of the menu bar allows you to filter by shuffling through categories.
Nice use of direct manipulation to set volume and filter the feed. To get the full demonstration, click the video link on the product page.