Live Journal Ancestry: Who made you get a LiveJournal? Post that person's LJ, and if this meme spreads, see, you'll eventually be able to click click click and see who your LJ grandfather, great grandmother, great great grandthing, etc, etc, is all the way back to the pioneer days.
nyarl brought me into livejournal while I was in Japan for school. It seemed a fantastic alternative to sending multiple individual emails to friends/family back home. I also wanted to chronicle my trip, and it made more sense to store it digitally than being chained to my paper diary.
What's cool is that livejournal continues to fill the same purpose, only on a smaller scale. I read it to keep up with my friends who live outside of Oxford and to encourage myself to actively write in my journal (although I've been using my paper journal and the private option on here more often as of late).