Electionary, the new iPad app from TargetPoint Consulting, lets you browse national election data, from 1976 through 2008.
Electionary is an election resource center that grants users access to over 30 years of county, state, and national election data. Electionary transforms election results into an easy to understand, interactive, and visual format. Users are able to see detailed election results and voter turnout percentages from across the country. Users can compare election results side-by-side and see how one county or state has changed over time or see how two counties or states are different.
There were a few spots interaction-wise when it didn't do what I was expecting, such as pinch or double tap to zoom, or when I switched years, the map would re-center on the selected state or county instead of staying where I had panned. But if you're interested in historical elections data, Electionary ain't bad, and I can only imagine there'll be un update after elections night.