Any interesting things occurring concurrently with the storyline can be posted here. Rumor, articles, town criers, wanted posters, etc are all great sources that place the characters in the larger world. These things need not directly involve the PCs, although even if they don't the PCs may decide to involve themselves! For consistency, it might be best to have the source of the info followed by the subject. For example, [Town Crier] "Nightstalker still at large!". Then the entry might go on to detail the latest victim of foul play at the hands of the mysterious villain.