I'm just getting into the idea of using the "shared items" feature of Google Reader (Google's online RSS reader). I've been a heavy user of Google Reader right from the start, after using NetNewsWire (which is great) but wanting to read my feeds on a variety of devices (not just my Mac).
Google Reader has, for some time, offered a way for users to share interesting news items. You simply click "share" at the footer of an item, and that article is instantly available for others to see via RSS or your "shared items" page. I hadn't really thought about the utility of being sociable with articles in my newsfeed, and have usually used Delicious or good old email to share things.
You can see what I have recently found interesting in the sidebar of this blog, or view my shared items via Google. I expect to syndicate a digest of them here as well, making my blog into a bit more of a hub for my online activities.
It will be a fun little experiment, if nothing else..!