http://www.dailykos.com/storyonly/2006/11/5/191647/511
I know it's from DailyKOS, but the blog post cites sources that will hopefully be more credible to right-leaning readers.
Evidently Republicans in some states are making computer-dialed calls claiming to be their Democrat opponent. If the voter hangs up on the call, the computer calls them right back, making it look like the Democrat is auto-harrassing the voter. If they stay on the line, they get rhetoric bashing the Democrat.
Federal law requires commercial and political callers to honestly state who they are and what organization they're calling with, so these calls are illegal.
This isn't quite what I meant by election fraud (I had my eye more on vote suppression and tampering), but it's worth knowing about anyway.
EDIT: Here's a better source on that:
http://www.boston.com/news/local/con...the_campaigns/
Also this, at Metafilter:
http://www.metafilter.com/mefi/56076