There's a great article from VerySpatial making the case that the use of "analog" maps in cases where differential information is being compared might night be the best way to display data online. We've been looking into this space recently and already have excellent KML Export in Cartographica, which can be easily paired with online tools like Google Layers and Leaflet.

The original article from The Washington Post is an interesting piece about use of time across the US.