Kim Zetter at Wired has written a longish article about the dangers of e-voting. Worth a look. Wired has an archive of stories on the e-voting issue, headed up "Machine politics" which I'd suggest is a good starting point for anyone with concerns about the use of computers in elections.

Zetter's article gives an idea of the timeline of when and key folk involved in the publicising of the problems, such as Rebecca Mercuri, Bev Harris, David Allen, Avi Rubin, Yoshi Kohno, Adam Stubblefield, David Dill, David Jefferson, Nebraska Sen. Chuck Hagel (Republican) and New Jersey Rep. Rush Holt (Democrat). It's largely told from Harris' perspective.