I've got a feeling that the links from these de-indexed blog networks are still good to go, just because G showes us they are de-indexed, are you going to belive the links really have no value? I bet G would love it if they could make us think that. I bet they have moved these networks into their 'older supplemental index' (the one that does not exist any more ...yeah). I don't belive G would ignor all of these blog networks because they could all to easily miss out important information that may be in these blog networks. G might need them just as much as we do.
A few scare blog posts from Matt C, shift some blog posts into a different database and send some threatening messages to webmaster tool accounts ...
its time to test this, I am going to promote a new site with a blog network that is de-indexed, just to see what happens ...
Will post back soon!