I have written a small script that will convert all of a LiveJournal user’s public posts to “friends only” (or locked to a particular friends group). It isn’t worth making a website for if there isn’t a demand for it. So, for now, if you or someone you know would like to make a previously public journal become “friends only” and you don’t want to do it by hand, send me an email and I might be able to take care of it for you.
*note*: This code no longer functions. Therefore, please don’t email me asking for it. Thanks.