good post! glad to see more people thinking about this. and i appreciate that you started from feed readers instead of from scratch. they may not quite enough for notes, or IndieWeb in general, but they’re still a solid jumping-off point.
btw, in the same vein as Bridgy, if you’re interested in ways to connect the silos to your reader, check out silo-to-RSS bridges like facebook-atom, twitter-atom, and InstaFeed.