In our group's main / most consistent campaign, one of our friends has this quest that will take him easily into the epic levels to finish because it deals with finding a dead god.
Meanwhile, my level three character knows a hell of a lot about that god's resting place, but is sworn not to share any of it - and I'm not supposed to share it OOC by the DM's asking.
... I mean, I enjoy secrets, but FRGHRHFHRHFHGR.