So I stumbled across "GEFS" (Google Earth Flight Simulator). It uses the Google Earth plugin and your web browser, and allows you to fly a few planes around to explore the imagery from Google Earth.
http://www.gefs-online.com/
Obviously, Google Earth has its built-in flight simulator mode, but this seems to be a notch above that as you can select different planes and there are other "real life" pilots flying around as well. It is very simple, and doesn't have anything realistic in terms of navigation or communication, so true flight simulator fans will find it lacking. But it is fun to fly around and see some interesting places.
Plus, being within the web browser, it is very easy to distract yourself for a few minutes during a monotonous day. That can be a blessing and a curse.