I am working on a big set of LJ/WP integration plugins for WordPress 1.2
I've got LJ Tags supported so you can use LJ user and LJ cut in your WP posts, I have a plugin to read Music and Mood meta data and have a minimal support for pulling the Mood icons from LJ. I hope to expand the support in the future, but for now I have to focus on getting the larger bits done.
I am working on making a plugin to set all of the meta data fields nicely (since otherwise it is pretty ugly in WordPRess to use meta data right now)
Once I get that working with moods and music I will be working on creating a full LJ/WP synch plugin that will let you add and edit posts on WP and LJ. I also hope to support mirroring comments as well.
This is going to take a little bit of time, but I am pretty close on most of it. Once I get the Meta Data editing interface done, the rest is just a bunch of XMLRPC calls so it should be pretty easy.
I don't know what Licenses some of the other LJ code is released under, but if you don't mind me using it, that would be great. Otherwise I will just have to rewrite it myself :)