I've heard about guys who "collect" sightings of airplanes in flight on Google Maps and found a plane in flight myself just this evening. I searched Google for references to it but couldn't find a single one so maybe this is a new sighting.

The airplane is almost directly over George Washington's residence at Mount Vernon in Virginia.

Below is a screen capture of the view on Google Maps. The plane is there in Google Earth also. If you look just south of the main residence (the large red-roofed building adjacent to the oval drive) between the house and the river you'll be able to see a passenger jet in a steep bank. The second image below is zoomed in on the jet.

Google Maps image of George Washington's residence at Mt. Vernon, VA. with an airplane visible in a steep bank directly south of the main house (large red structure) between the house and the river.

Zoomed in on the plane shown in Google Maps and Google Earth images of George Washington's residence at Mt. Vernon, VA. The airplane is visible in a steep bank directly south of the main house (large red structure) between the house and the river.

Cool.