It does seem to be in vogue to discuss one's LiveJournal alternatives right now. So:

I have a JournalFen account and an InsaneJournal account, both with the handle of scifantasy.

I also have accounts in a few other places, such as Blogger, but as far as active journaling/blogging sites, it's just the three journals.

At present I do not mirror any content from this account to those; the JournalFen account is for my participation in Fandom Wank and its offshoots, and the InsaneJournal account is for following a couple of friends who use it as their primaries.

I would be extremely reluctant to move off of LiveJournal; my primary motivation has always been following my friends and their posts, and I doubt that all or even most of my friends list would end up in one other place.

What this would mean, should the worst occur and the switch be thrown on LJ, is that I'd probably end up with even more accounts on journal sites, mirroring my own posts to all of them. Unfortunately, I suspect it would cut down on the interesting comments that come out of different spheres of my friends interacting. I've always said that was the best part of LiveJournal's system.

Plus, I have a lot of material on LJ. Especially when you count comments.

And finally, I really like LiveJournal's system. Threading comments, especially, with email options for replies; locking posts (I have a single friends-lock, in which a person is either in or out, and most of my posts are locked); you get the idea.

Admittedly, I have a Basic account, so I'm not in a position to complain if something does happen. Still, I really don't think I'll have to change. Certainly not any time soon.

But feel free to add me on IJ or JF.