Thanks, but it's not the maintenance light (that light came on as I approached 5000 miles and has since be reset). This is a yellow light in the lower right of the display, with an engine icon and the work "check" below it. You can see it light up briefly when you start up the car.

I'm going to swing by the dealer on the way to work to have them check it; hopefully it was just the loose gas cap, and they can reset the light.