Election fraud is not yet a proven fact but not just a a wild conspiracy theory. I have linked to Brad Friedman's posts about Clint Curtis in the "heroes" section of my links. Here is a quick summary of what Clint has to say (and I believe Clint Curtis and not Tom Feeney.)

In 2000, computer programmer Clinton Curtis was asked by a GOP congressional candidate, Tom Feeney, to create a software program that would alter vote counts in favor of the Republicans. Curtis testified to this under oath, signed an affidavit, and took a polygraph test. Of course, Feeney, now a congressman, denies Curtis' allegations, but unlike Curtis, Feeney refuses to state his denial under oath or to submit to a polygraph.

www.democraticunderground.com/crisis/06/050_ep.html