I haven't been friended by a Russian LJ user/bot, but
geminibalance recently was.
As I noted down in her comments, it would appear that this might possibly be a legitimate LJ as it actually contains blogging posts, unlike all of the other Russian adds I've seen friends mention, but as I can't read Russian I can't be sure. (I'm planning for a friend who's taken a couple years of Russian to perhaps verify this for me.)
I also pointed out, I looked into one of the gadgets on this LJ's user profile page and if you get far enough it will ask you if you want the gadget to be auto-added to your profile page -- all you have to do is provide your LJ name and password.
I doubt I should have to tell this to any of my friends since I try to only harbor those with brains (the tastier for me to eat in case I ever turn into a brain-eating zombie), but I still would not be a good friend if I didn't put it into good ol' plain Engrish for all to see:
AVOID LIKE PLAGUE TEH INFO PAGE GADGETOr at the very least, verify the coding for it and paste it manually yourself. I'm not bothering to tell you which gadget it was, because that is a moot point and irrelevant if even one of them turns out to be malicious.