One of the outcomes of the 2000 controversies was the enactment of the Help America Vote Act in 2002 with strong bi-partisan support.
Among its provisions are requirements that states must have a centralized voter registraiton database and Voting systems that produce a permanent paper record with an audit capacity that can be manually audited.
The effective date was 1/1/06 so this will be the first election where these new standards are tested. I suspect we will see more challenges then ever before from whatever candidate(s) loses close elections.
http://www.fec.gov/hava/hava.htm
an addendum for NCB
In this current session of Congress, a Repub senator introduced a bill to amend HAVA called the Voter Protection Act of 2005. Among its provisions was the "removal of registrants from voting rolls for failure to vote"
One of those wacky bills that had only 4 other Repub co-sponsors and died a quiet death.....even other Repubs didnt want to take away a fundamental right, even if you chose not to exercise that right (for whatever reason).