In the OLD design, there was the "invite friends" (or some such) link right in the sidebar ... now, who fucking KNOWS where it is! I finally got to the right page by going into Help and the FAQ, but that is a HUGE pain in the ass. I still haven't found the link that would take me there from the new style, and I'm beginning to think it's not in there.
Anyway, since I'm such a nice guy, I'll pass along the direct link to that page (though it wouldn't be brain surgery to guess where it was) ... it's at http://www.livejournal.com/invite/ ... see, now YOU don't have to go looking for it too.