Did you bring up the Diginotar hack/scandal because you think having a citizen authentication system is a terrible idea? I think the diginotar incident showed more of how bad the SSL CA situation really is than of the lacking security of digid.
I personally think digid is a great idea, and actually that it should be opened up and extended to allow more (non-government) organisations to make use of it for true "real name" authentication.
I brought up the Diginotar hack because the security of the Digid system depended on an organization that was so thoroughly owned up that it was forced out of business, and I felt like that was relevant to a discussion about centralizing the authentication of citizens to a single organization that could be trusted to get things right.
I personally think digid is a great idea, and actually that it should be opened up and extended to allow more (non-government) organisations to make use of it for true "real name" authentication.