More Interesting Maps

American Migration: http://www.forbes.com/special-report/2011/migration.html
Historical maps: http://www.the-map-as-history.com/

World imagery: http://www.flashearth.com/

Nice Campus map for Univ of Wisconsin: http://map.wisc.edu/

Zillow real-time house prices: http://www.zillow.com/homes/22030_rb/

Another nice campus map: http://maps.utwente.nl/index2.php?lang=nl
Metro Trends: http://datatools.metrotrends.org/charts/metrodata/CESMap_files/CESMap.cfm?statids=38,29

And The National Map viewer courtesy of USGS: http://viewer.nationalmap.gov/viewer/