We have no clear favorite for this week’s piñata. Although AIG derivative traders are still much-hated, the furor seems to have become more generalized and so they don’t qualify as a target. Has to be a recognizable name, and to be the piñata you really need to have generated a prominent, temporary spike in negative attention. If things went a little differently this week, it could have been Geithner. But he’s in the clear for now. So. Let me think about it.