One other thought around circles. It would be cool if some kind of backwards circle functionality could be created. For example, I post a few links to my feed about tech stuff which only a handful of my friends are interested in, so I have two options:
1) post to just my "techies" circle so as not to spam my other friends
2) post to public so that anyone who's interested can see (including people who follow me but whom I haven't circled as I don't know them).
The first option excludes my followers, the second spams my friends. I could create another circle of followers and message them and the techies, but that doesn't sit comfortably, especially as I don't know which of my posts caused those people to follow me (perhaps a music video I favourites on youtube caught their eye and now they're getting spammed with HN links).
Having some way where I could create circles to publish stories to, but have others subscribe to those would be handy - I then publish to my "tech stuff" circle, and anyone who cares to subscribe to "JohnLBevan.TechStuff" sees it, whilst it's hidden from others (to prevent annoying them - not for security).
Again, I'd welcome your thoughts.
Cheers,
JB