Xjournal
Xjournal appears more involved and comprehensive program. Rather than just an entry client like iJournal and assume that your Livejournal account is already set up over the web, you can start from scratch through Xjournal and it'll provide helpful buttons and links to set things up. That and it shows off-the-bat multiple user settings. I'm not sure if iJournal does that. But since I care about none of these features, I may not use Xjournal. More features too.