I am about to try to make the Wordpress version of my site go live, complete with functionality that cross posts to LJ. In theory, this will cross-post only future posts made, not archived posts. If it does otherwise there will be a scream of horror from my location and I will turn the whole damned thing off as fast as possible and apologize profusely to poor spammed friendslists.
I think the mizkit_feed is hooked up to index.php, which is what will be going live in a minute here. I would strongly suggest un-friending the feed if you've got my LJ friended, because I'm pretty sure I can't stop it from bleeding posts all over the place once it discovers there's something located at the new index file.