Google's now providing a comprehensive Election Ratings Tracker for the 2010 U.S. Senate, Congressional, and Governor races. "This interactive map visualizes the latest data from a variety of the major national polling institutions, color-coding the polygons by projected winner, and letting you quickly see details for any jurisdiction.
We used App Engine Cron Service to parse the data feeds into thirty separate Fusion Tables, styled the data with Fusion Tables' new styling options, and then built interactive app you see in App Engine to call them all using FusionTablesLayer class in the Maps V3 API," explained Google.
For details on how to do this yourself, see article Election Ratings and Spatial Data with Fusion Tables.
Visit: Election Ratings Tracker