I've been considering setting up a feed of my Twitter posts into DW/LJ, since I write marginally more on there than here. OTOH I used not to like it very much when other people did the same thing so maybe you'd find it annoying too. Do you think it would be worthwhile?
No, I'm not going to put my Twitter details in for LJ to do pingbacks. If/when I choose a system to do it, I'll check it out for privacy concerns, or maybe run something on my own server.