I’m using the browser FLOCK which allows direct blogging to WordPress. The trouble is that when I give it my username, it pulls all 3 of my blogs with the same data – that of the PRIMARY blog. That means that even though it looks like I can post to all three, they all end up in that one blog.
The settings include Blog URL and Blog ID. I bet if I can work out the blog id of the other two blogs, I can make this work.
I downloaded BlogDesk a free off-line blog publisher and it finds this information for me. Perhaps you’d like to try it too http://www.blogdesk.org/en/index.htm
It’s the only method I know of to get this information but perhaps other bloggers have a better one.
P.S. Using BlogDesk is easy and using it means you always have a back-up copy of every post you make as well.