If you’re streaming into Washington D.C. to see Barack Obama sworn in as America's 44th President, you can install Google Maps for mobile on your mobile device so you can use My Location to pinpoint your current location. You can also check live traffic conditions before you set out by clicking on the "Traffic" button on Google Maps or take a look at Trafficland to map streaming video camera views.
Or with Google Earth installed, click "Download Model" to instantly import the full scale replica of the 2009 Inaugural Stage into a 3D view. Zoom in close to where Barack Obama is standing on the stage to take in the exact view he has or swoop down to the National Mall to see what millions of other spectators are watching.
More info: Google LatLong Blog