[jks]

This seems to resemble how Google Reader used to work. I think you could share items to your contacts, or perhaps it was just "starring" items and your contacts would see what you had starred. You could write comments on items that your contacts would see, but there were never comment threads like on Facebook, or "liking" your friends' shares.

[super_throwaway]

I probably should’ve been more clear in my writing. There’s no sharing, the only interaction between users is comments.

This being open source and possibly extensible, that could always change though