They're obviously not blogs, though they do have some similarities.
So what are they for? They're web pages and sites that have some element of social networking, but they're also places to put details of who you are, what you do, what you like. You can may be add some media, and links to friends and sites you like.
Now, I know I've been around online longer than many bloggers have been alive, but there's one thing I remember back in the days when we were building the first ISPs, and setting up user public web space soon after.
We had an idea, and we had the tools to help build them.
They were web pages that had places to put details of who you were, what you did, what you liked. You could even add some media (once Netscape invented the object tag), and put in links to friends and sites you like. You could even link them into social networks.
We called them "Home Pages".
Maybe it's a term we need to bring back.
I still kind of like it, even if it is a little "Web 0.2"...