A few URLs to tools for archiving your LiveJournal.

[randomness]

This seemed like a useful time to start collecting these. I haven't tried any of them, but if you have any experience with them please comment.
Also, if you have any other links to add, please comment. If there's lots of interest, I'll put up a permanent page and post a link.

http://neuralabyss.homeip.net/articles/2004/ljexport
http://www.livejournal.com/export.bml (only does a month at a time, and doesn't do comments)
http://ryzh.kiev.ua/ljsm/index_en.html
http://www.livejournal.com/~elfric/109220.html
http://ljcharm.sourceforge.net/
http://fawx.com/ljArchive/

(Scraped, alas, from /. :) )