I'm asking Adam about it now :)
I'll get back with ya soon (if he doesn't beat me to it :P)
The only time I saw that notice was when I posted a second comment as an edit to my first one.
It means that your comment doesn't appear until it's been approved by an admin. I don't know why so many people don't understand this. It's to prevent dorks form spamming.
Mike likes his blog such that everyone gets ONE comment under 700 characters. Just because the one comment rule isn't strictly enforced doesn't mean people should post as many times as they want.
Are all you people with problems posting more than one comment per thread?