The absolute best livejournal client for the Mac is not even on Versiontracker. It is called XJournal.

You can find it here: http://www.speirs.org/xjournal/

I don't know why it's not listed here, as this is where most people go to get their stuff. But it just means that a lot of people are wasting time and energy on clients with half of the features and ease of use of XJournal. I found it buried on the actual LiveJournal site, but it's nowhere to be found here on VT. Pity.