well, this sounds like a great plugin even if it only does a few networks for free but...
under posts>postbox when i make a new post in the postbox interface i had two problems:
publish to my FB page: it doesn't publish the 'body' or 'title' of my "postbox" post - only the 'message'. so that's really confusing. but it did publish just the 'message'
But my regular WP post did publish nicely.
2) I tried to publish to linkedin from "postbox" but it just kept saying 'posting' and didn't actually post anything. then i tried again and it said it posted but it's not on my linkedin profile.
Now i realize that i am not clear what it even means to publish to linkedin - linkedin doesn't seem to have a 'wall' like Facebook or a blog area to post in. i see i've connected twitter to linkedin so that appears under 'connections'.
Oh the confusing world of social media. Any help on this issue will be appreciated.