LJ might not equal fandom, but still...
Seriously, you don't realize how much of fandom is on LJ until it goes down.
Oh, look, some meta I'll read -- oops, no, it's on LJ. Hey, someone bookmarked a new fic on del.icio.us -- nope, that's on LJ, too.
This is why, whenever possible, I try to bookmark fic on the author's site, not LJ.
C'mon, LJ, start working again. I'm bored, and I've been waiting all day to read that fic that showed up on my del.icio.us subscription page.