Mexico: Palast reports from Mexico City
I'd say there's nothing here that alert Corrente readers haven't seen, but it's early days yet.
Re: ChoicePoint. He's pushing it hard, but the idea is that the ChoicePoint database contains a lot of personal information, and that was used to intimidate. So ChoicePoint wouldn't have been used for the voter rolls. This strikes me as at least plausible.