MochaJournal is a JAVA based LiveJournal client that is designed to work on any platform that supports JRE 1.4.2 and above. It has been tested on Fedora Linux Core 3 and on Windows XP.
You can get more information at the mochajournal community site. You can also download the latest version at the MochaJournal Website.
Expect more support and enhancement to MochaJournal in the upcoming future.