I have been working since May 2003 via email with dozens of technical persons including college professors to translate the technical concepts involved in E-voting for non-technical persons.
Try
USTogether.org and select "Elections and Voting". Then click "Read More" on any of the articles to get understandable explanations and lots of links to great sites on the dangers and solutions to E-Voting machines.
Here are a few of the articles:
Election Rigging Like Never BeforeSuggested Letter to US CongressionTechnical Discussion of Solutions for Electronic Voting Problems, Written for Nontechnical PersonsLinks to Excellent Sites about the problems, solutions, and history of Electronic Voting Machines.