Posting to Livejournal and Dreamwidth?

Is there any simple way for me to post to LJ and have a duplicate post appear on Dreamwidth, rather than vice versa? Think it might be much easier for me to work that way.

Semagic

Trying Semagic - what I can't see, unfortunately, is how you get it to post to more than one journal autometically. How do you add a Dreamwidth account and post to both?