1 - A dedicated "sticky" section for new releases, news, etc., and a bit of restriction on it's content, ie no "cool", "got this, it's cool", "Paypal'd", etc. stupid posts. Should a particular release begin to generate actual quality discussion, breaking it off into it's own thread should be a good idea and not too unrealistic to moderate since it is, as mentioned, not a usual occurrence.
So far, such discussion as there is on new releases seems pretty contained, by comparison to other forums I know where a thread can go for pages with useless, trivial, few-words posts. That's down to common sense on most of the users here, I think, so harsh moderation has been kept to a fortunate minimum. Still, having new releases in their own section not only makes such moderation even easier but it makes it easier for users to post their release news in a section that will generate interest and keep the forum a bit cleaner, for discussion.
2 - Either the "graveyard" section for redundant posts about out-of-print issues, etc., or simply delete those posts where the release has become forgotten/sold-out. Personally, I wouldn't be very interested in such a section but I can see why it would have some value.