[macgirvin]

But my work friends aren't your work friends. Our friend circles might overlap but they aren't the exact same. So why should you be posting to my work friends group? Don't get me wrong - I think you have an interesting concept here, I'm just trying to understand it better. (I wrote Friendika, which is kind of like Diaspora but a bit more capable - I could probably make something like this happen.).

[joebadmo]

Well, if we don't work together, we wouldn't share a work friends group.

It's true that a places metaphor is a bit less granular, but I think it makes it easier to understand how things are being shared than a bunch of one to many connections that overlap to varying degrees.

Also, there's no reason you couldn't have both, since the places metaphor is really in practice just a subset of everyone having individual group lists.