In my view, a promo section would be for promos. That's more complex than it sounds, obviously. We moderators would have to use judgment on what it means, and I have confidence that we could sort it out.
Steve's parodies and such could go in either category and we'd probably leave them in the lounge or Writer's Corner because of the entertainment value. But if he wanted to advertise the Verdant Skies sequel just on its own, he would put it in the Promo Section. Likewise, when he talks int he lounge about what he is doing right now and mentions that he just finished the sequel (hint get yer ass to work) then it is just a part of talking about his day. If a newby member who is an author comes to the what are you doing right now thread and says the same thing, I see it as being just the same thing.
Not sure where I'm going with this ramble other than to show some of the thought processes I'd use in making decisions.
I am promoting having the section not as a ghetto to get rid of annoying promotions, but as a tool and asset to help our authors get a leg up in the whole get your stuff out there business.
It would also be a really good Spam filter.