So here's introducing LJ Post. This tool allows you to post to more than one journal at a time.
A few days back, I was having trouble accessing LiveJournal from my ISP, so I had to access it behind some proxy. That was solved. However, I was unable to post comments/replies to anyone, so I wrote a tiny little Perl/CGI script to do it - Post Comment
I don't have the time to package the source code of the apps right now. You can watch this space.