[pzb]

In addition to the DNC voter file, there are similar lists available commercially. http://www.voterlistsonline.com/ is run by Aristotle (who tends to have more GOP clients, but is non-partisan). It has many of the consumer data fields already matched that are discussed in the article.

I would not be surprised if Aristotle wasn't one of the six customers to which Georgia sent the data. They have been collecting voter data for years; I worked there for a few months more than 15 year ago, and they already had a nationwide database mostly loaded from 9-track tape.