Exactly, I see your point tallimar, since the general quests would be the open-ended ones I mentioned, they should be in a centeral place where everyone could access them. This is much more efficient! Of course, in the posting of such a quest you would:
Give away your quest, just like a personal quest.
Set a max number of people, time frame, e.t.c
And most importantly, give away your position, as in level, city, region, and maybe coordinates like /pos.
These would be easier to administrate too...