Tl;dr most of it.
Actually I thought about implementing that with the new improvements to be done to the sim. I thought maybe putting a little scroll on the wall like we have our weather broadcast system, where people can click and get basic information about the area they are in.
But at same time, why don't you approach someone and ask? I would prefer if people approached eachother, IC preferably, and ask, "Hey, what are these ruins here?"
What do you folks think? Faceless little notes with info, or emphasize the "talk with people!" attitude?
In this case i beleive a previous player was at one point being an archiveist, prehaps we can use both? as a saying ive picked up from GW2 "history never lies, historians however.." Prehaps the library can be rebuilt, made a bit more noticable and have an official historian/liberian/archivist etc. That way the scrolls are the "written" history maybe with things that are a little less known, like accounts of the Zenko before the goddess blew it up, so on, things that alot of newer lismorians wouldnt know, whilst at the same time having the curator be the font of knowladge with the bits not said. For example, a scroll could say that the original Missing Key, was burnt down by bandits. The curator however would fill in the rest, about how it was Allura out of trying to get revenge set fire to Jay and burnt it down. Little things like that.
In regards to the events and notices perhaps maybe put up little signs in each main area, City, Zenko, temple, phoenix, similure to the OOC boards of old, which could be updated to say New event soon, check the forums! and maybe if possble when you click it, it links you to the forums, that way, if you didnt get a notice, and dont check forums often, you can at least see somethings due and gives you the kick in the butt to check.
Edit: Also, it might be worth considering making a propor full on OOC area with the Sim admin boards, our rules so on, along with an upcoming events board, i think a ship off the shore of lismore would work. That way, its somewhere people can go and actually check things