[aprescott]

What about the case where it isn't a long-form post, but something more casual like a retweet or a link to some website? I can see the blog solution working out there, too (cf. Daring Fireball), but you might not want to have that full setup for more ephemeral (yet interesting) stuff. There also might not be one specific topic. I'm not disagreeing with you, I just wonder if there is a way to use a social network like Google+ for Everyone, as they market it, which is sensible. Maybe not.

[ebzlo]

If you really just think about what you're sharing, it's likely going to fall into one of three categories.

1. I want to share this with my friends and family, it's ephemeral, will interest them, and expresses more about who I am.

2. I want to share this with my coworkers and colleagues, it is relevant to our professional interests. This category also happens to be the "Public" category for me in a lot of cases, because anything I share professionally, doesn't need to remain private.

3. Anything off topic here. Something that lands in this category (while interesting and relevant to you) is, for the most part, uninteresting to the audiences you've made yourself available to.

[dylangs1030]

To be honest, even retweets and links to blogs I wouldn't show interest in on Facebook. It's not a matter of a post being too long for me to read on Facebook, or I would. It's a matter of expectation. On Facebook I expect to see a personal opinion about the way politics is being run, not a link to a professional discussion about politics. Both happen, but the second is likely to see much more action on a medium like Twitter.