Let me offer a link to mine, too, then. My LJ. That has only things I’ve posted (except things I’ve “locked”- you can’t see them because I haven’t listed you as a friend (obviously, since you don’t have an LJ).
Now, the page people will generally spend the most time on is their friends page. Here’s mine. Most of the people I know on LJ are people I met through here, so you’ll probably recognize a few of the names. From my friends page, I can read the journals of those I want to keep in touch with. I can also comment on their entries (if they’ve allowed that option), and read/respond to other people’s comments.
If you scroll down a bit in my profile, you can see not only whose journals I read on my friends page (“Friends”), but who reads mine (“Friend of”). As you can see, voguevixen is on both lists, so when she posts an entry, it will show up on my friends page, and when I post an entry, it will show up on her friends page. As you can also see, I do not have the community you referred to on my friends list. Therefore, if I were to read posts in there, I would actively have to go to that community and read from there. As it stands now, I will never see that community* unless I specifically go there. And if you want to be really sneaky, you can tweak it so that it appears that you have someone listed as a friend, but they don’t show up on your friends page. I am a “member” of that community (at least I think I am), but all that means is that I have the ability to start a thread in that community. That handy for communities that you might have an interest in, but don;t want to read daily. I added a No Doubt community to my friends page a while ago, but since every post was about Gwen Stefani’s new fashion line, I opted to remove it. However, I remained a member, so I could (A) post to it if I wanted, and (2) find it easily when I want to.
LJ’s good that way- you have a lot of precise control over who can read your journal, though if you comment in other people’s journals, your comments are open to anyone who can read that person’s journal. There are tons of customization options on LJ, depending on how much time you want to spend learning them.
It doesn’t cost a dime to join, so you might as well join up and test the waters. It’s not for everyone, but I think the best way to find out is to just jump in. You’ll recognize old Dopers, maybe meet other authors, or people in your area. A lot of Dopefest planning happens on LJ, especially the smaller fests.
On a site-wide scale, the signal-to-noise ration is much lower than the SDMB, but the sheer numbers of people with LJs guarantee that there’s probably a few hundred people you’ll find interesting enough to catch up with daily. It’s just a matter of finding them.
*-I believe that the SDMB staff here doesn’t want the names of the SDMB related LJ communities mentioned on this board, for understandable reasons.