It can be found here: http://www.bloglet.com/
The only fields that need to be filled in when setting up the weblog are:
server: which will be http://www.livejournal.com/users/YOUR_USER_NAME/data/rss/ where YOUR_USER_NAME is your LJ user e.g. mine is beren_writes
weblog type = RSS
and the other choices for config which are self explanitory.