We've all seen it:
/about something
You then get a response about whatever that something is. I want to suggest a way that characters can submit information that, upon approval, will be known about that character if asked. For example, if I submitted info for Jonoth to specific NPCs, then on approval they get asked /about Jonoth, they might say one of the following:
Trasok or Harnquist: See him around the forge often. A menki with a red paw print on his face and wearing many belts. He carries two interesting short swords made of blue-steel. Seen him trying to perfect making them himself.
Allelia: He comes here a lot. Almost always orders beer. He's menki with a red paw print on his face, and wears these crossing belts.
Brado: Yeah I've heard of him. He grew up in a village just outside of Ojaveda. His mom was a great dancer and his dad was a mapmaker. Troublesome kid though. Went off and joined the military. Back in town now though. Seems like an honest menki but sometimes I wonder. He got a red paw print on his face, and a bunch of belts with swords and daggers and stuff.
And so on
Settings could filter it a bit and make it more in character for those NPCs, or they can have the players fix it up until it gets approved, or just let players edit it and let other players flag inappropriate content. This can be limited to 1 or 2 submissions per char per year. Probably something that would have to be done through the forums, but maybe something to add in-game as well.