Download http://lj.crschmidt.net/jbackup-export.pl.txt
cp the file to jbackup-export.pl and mark it executable.
Run:

./jbackup-export.pl --user=username --password=password --sync

This should report that everything worked okay, after spending about 5-10
minutes downloading everything.

Then

./jbackup-export.pl --user=username --password=password --dump=xml |
 perl -pe "s/\&lt;/</; s/\&gt;/>/; s/\&amp;/\&/; s/\&quot;/\"/; s/\&apos;/'/;"

 Then edit $wordpressroot/wp-admin/import-livejournal.php, and fill in the
 first line with the name of the file where you stored the file.

 Then go to $WPWEBROOT/wp-admin/import-livejournal.php , and click the link
 towards the bottom of the page.

 Then watch as your journal is imported.

 All entries will be public.