I've wanted to know how to do this for over a year. Not having the time in the past, well, the task just got delayed over and over. Now I finally figured this out, and I'm sharing with you. Surely there are other bloggers that prefer to use their own blog client and MarsEdit in particular if you're using an OS X client.
So, without further delay, here is how I set up my own MarsEdit client to blog on java.net:
I have one last problem to resolve. When I send my blog entry to java.net, the resulting entry is in draft state. I had to go up to java.net, log in and manually change this from draft to published. That's inconvenient.
If you know how to get me over this last hump, I'd very much appreciate it. I want to blog at java.net again, but I just would really prefer to use my own tool instead of the drupal web interface.