I've been having that lately when I am posting to a large number of people (my moral absolutes list has over 200 people). Don't do anything, just go back to FR and look at your pings, you will see that it was posted.
That is what I am finally doing. I open a new browser now and keep it refreshed, so I can check on every hung post. Normally it is ok, but with this new satellite broadband, such delays are frequent and come in series, spurts.