These are unorganized thoughts that are bouncing through my head right now.

• Facebook and Twitter could become less ephemeral. I first said should not could, but there's a trade-off there. The reason for becoming less ephemeral is to allow users to collect and re-assess their fleeting thoughts and links and conversations for later consideration. The reason not to, of course, is that sometimes you don't want that.
• On balance, though, I'd rather have it than not. After all, I'm pretty sure that (in some abstracted sense at least), it's being done about my data for other reasons. Why don't I get to play?
• I'm hearing more about Livejournal from outside the circle of people-who-have-been-using-it-all-along. I doubt it is going to have a renaissance in a business or growth sense, it's more that folks are figuring out some of what was right about  it all along. I tend to think about this in terms of UI details (like putting the "who this post will be exposed to" option very clearly under every post) that emphasize its flexibility on the public / friends / private axes. This person seems to think somehting similar. But it's not just about that axis, there's also something about navigating the line between intimacy (Facebook, at it's best) and publicity (regular blogs).
• I'm pretty sure that last is at least one reason why Tumblr is taking off as it is. It has really nailed the feeling of connecting intimate communities while also constantly running into new things.
• I wish it had a "friends-only" post feature, though. That's Livejournal talking again.
• On a third axis (personal control), I was and am pretty skeptical of the chances of Diaspora's success. But this post on why gender is a text field on Diaspora is one of the finest things I've seen in a long time and pleases me muchly.