A bulletin board would keep village members updated instead of looking at a thread every time. It will also be good for players in-game to read it and look what is required to join the village. You can rely on making runestone the whole time.
How to make it would be simple, I guess. Just get 3 logs by cutting a tree with a stone axe, 12 sticks or branches to keep it up, and put it on paved ground.
It can also be built in buildings if they're big like the stone mansion or timber house. It's a 3 x 1. You can use parchment to post the stuff on the wall. Just right click the board, it'll give a zoom in view. You can right click the board again and it'll have a few choices. One, post with written parchment. Two, remove post (unless claimed by village or claimed by player). Three, replace post with your own. When you right click a written parchment on the bulletin board, it'll zoom in again. To zoom out, just use left click. You'll need boneglue or something like that to attach the written parchment onto the bulletin board.
Sorry if I messed up.