idonotlikepeas holds forth on the common assumptions of IM etiquette.
Hilarious bogus tutorials.
Hot, omg hot: http://synecdochic.livejournal.com/117619.html (sg1)
http://community.livejournal.com/metaquotes/5993308.html -- seasonal humorous blasphemy.
Via metafandom: Is the nature of LJ changing? Discussion.
My contribution to the discussion:
I consider myself on the very outside fringes of fandom -- I read and link on a semi-regular basis, and I very occasionally generate my own content.
I post a mixture of everything, focusing on real life/work, links lists, and an awful lot (lately) of LJ meta, since I've gotten far more involved in the LJ administration process. (And since it doesn't hurt to pimp it out: if you know how LJ works, feel free to hit up the support boards and learn_support to help people out and get involved!)
I have started to skim a lot more lately, since my friends list is getting very crowded and I don't feel like cutting anyone or anything. If I do skim things, it's long entries by people I have very little emotional connection with, or news articles I'm not interested in reading, or (especially recently) LJ change updates that I only peripherally need to know about. I have a Default View filter, which I installed when I was having some friendslist drama; I now only use it to keep some high-volume communities from completely clogging up my friendslist, though I still will wind up needing to see the locked entries. Useful, that. If I do need to filter the friendslist for reading purposes, I use LJ's built-in person/community/syndicated filter, which works excellently for all my needs.
I think I comment the most on LJ-development-and-admin-related and personal friend stuff, though there are some topics that make me run off at the mouth, like this one!
I use my friends list for reading, primarily. There are too many friends for it to be purely reading, but anything I need to read on a daily basis winds up on my friendslist or else it doesn't wind up read. All hail syndication!
My outside readership sometimes boggles me. I've had a few random rants go LJ-wide (most notably my summary of the bantown cracking drama) so I've become far more aware that I'm being read and linked to in ways I have no way of tracing the connection.
I think LJ as a whole is becoming more aware that their content is actually on the internet, where anyone might actually see it. People are becoming concerned about these issues, and locking their personal content down tighter, but at the same time, getting to interact more widely with other sites rather than LJ just being a closed community with no interactivity with other blogging sites. I think that this is due in a large part to syndicated feeds of other blogs and OpenID commenting. I can't wait for LJ to implement TrackBack (which has been on the to-do list since like FOREVER, and who knows when it'll actually come out), because I think that will help LJ users become more aware of the rest of the internet. We're not just in our own little corner, and I think LJ will benefit from opening up and having more direct interaction with other sites.