I’ve installed a new plugin in my blog: LiveJournal Crossposter. It should automatically re-post this to my LiveJournal account but I’ve configured it so that all comments must be on the original blog post. I’ve also configured it so that you have to jump to the post to see what comes after a “more”.
I haven’t decided whether I want the blog post’s categories and/or tags to be used as the LJ post’s tags.
(The blog post’s subject is already automagically tweeted, so there’s nothing more to do there.)