It's almost four years now, but I had to rewrite this hack, and host it someplace so that it wouldn't melt my server.
Without further ado, check out LiveJournal friendsCollage!
Some changes have been made to LiveJournal, and we hope you enjoy them! As we continue to improve the site on a daily basis to make your experience here better and faster, we would greatly appreciate your feedback about these changes. Please let us know what we can do for you!