I understand what Ru means! We'll keep a list of what's already been done and take that idea away from the list we're putting into the randomizer.
I'll start making a list of the people involved right away. (will be posted into first post) And, I can see this working in a Social Group, also, but I kind of like the thread setting better. I totally don't mind if everyone prefers to put this into a Group, though..
Every two weeks sounds good.
edit: the info has been organized.