Upon discussion between Dan and I a couple weeks ago, the league will undergo a cleanup of the trade blocks. All of those old threads will be archived into the main board. Future trade blocks are expected to be a part of your team page. Announcing updates to such trade blocks can be done in a public, multi-GM thread in the main board.
I would also like to eventually remove the RC board because I feel much of the work has been done and future ideas can be discussed publicly on the main board. Also under consideration is a cleanup of the transactions boards but Dan and I need to discuss this one still.