My RSS reader (http://kouio.com after Google's shut down) has always been my complete command centre:
- Google Alerts
- LinkedIn updates
- Every issue/comment/star on my Github projects
- The exact ages of my children every day (via http://howoldismykid.com)
- New questions per tag on stack overflow.
- New messages for individual Google Groups.
and so much more.
I was just lost when Google Reader shut down thinking I'd lose all that, RSS really is the universal API of web data.