Well, the idea isn't too bad, but... I don't think it would really serve the purpose. If someone was a moderator, they might just find nothing to moderate. And if they do nothing, how are they supposed to learn the stress it brings? Of course, I might be wrong, but I'm usually slower than Derby or others when it comes to finding things worth editing, so that wouldn't leave much for me.
The case would be much different if the weekly moderator replaced an existing one, and thus lowering the amount of people "taking work away from him".

But I guess this will never be realized.

That said, Conker, you get a sub-weekly-moderator-warning for wanting to move a thread to the wrong forum ( a serious thread to Comedy Cafe ).
And props to Moonblaze for actually saying something god about me. *thumbs up* Thanks. =b