The little side quests from the Pathfinder comics make good bounty board notices. For the first one, I made a notice from Brodert Quink that he had dropped his spyglass over junkers edge and was offering a reward. They went to go search for it and stumbled upon the goblins that found it. It also got them to meet Brodert.
I also had a notice from the owner of the Goblin Squash Stables offering gold for goblin ears (one player immediately went outside to start lopping off ears from the goblin corpses left from the raid).
I had one that offered a reward for proof of the Sandpoint Devil (which a player has become obsessed with finding), and one for rare herbs from the areas around Sandpoint (so there is always something to do if one player is tired of being in town but the others aren't done).
I had a few flavor ones too, such as auditions at the playhouse, and a want ad for reporters for the Sandpoint Gazette (a newspaper I am making for the board every few sessions so they see how the town responds to their actions).