For FL, thats certainly possible in SP with full scripting support but the general focus is on MP. Crossfire comes to mind with MP storyline extensions, it includes (iirc) a dozen chapters of background story for the new systems, ships, and equipment. A lot of other mods have extensive background stories. Beyond that the options are very limited.
For OL, canon development is still underway. I long hoped this would take place on TLR with general community involvement but it didn't work out that way. Right now we have a general setting, rough campaign script, general timeline, background story, about a dozen factions, and a few characters defined. Anyone can help. Campaigns and quests are handled in a similar fashion to interactive fiction systems. If anyone is familiar with C++, LUA (or python), and what I'm calling "object oriented narratology", OL really needs help.
Another option is just making an effort to revitalize the fan fiction forum. Maybe organize a novel or interactive fiction project. If TLR added a wiki that would help a lot. There are several FOSS platforms for interactive fiction, they range from semi-linear e-books to old school text adventures (MUD's are an option too).
-Burn
Lead Designer and Webmaster,
Openlancer Project