http://search.cpan.org/~simes/LJ-Simple-0.15/
It is a year and a half old, and the documentation for the protocol has vanished...
http://www.livejournal.com/developer/modelist.bml
I'm hoping to use it to list the syndicated news feeds which are read by my friends.
(The alternative module http://search.cpan.org/~bradfitz/Net-LiveJournal-0.27/ doesnt look very extensive :-)