Expedition: general discussions.

I was thinking, maybe for New Year's.

Alex was planning to launch it by January, I think. Revan also seemed to be considering something.

a short online quest, like an expedition

If it's just a verbal quest, I doubt many people will enjoy it. And, as I see it, it's worth trying out the role of a player first, to get a feel for the specifics of the expedition and to familiarize yourself with the playing style of potential participants.

With puzzles

Good idea, players really liked the quests with puzzles in RI 1 and RI 2.