ghostly windows

I took this photo just on sunset, and I kept it at the time because I thought it would look good on here. One of the great things about the Powershot A720 is that I can manually set the shutter speed to get effects like this.
This photo was taken on Sunday 13th April 2008 at 5:08:26 PM, with an exposure time of 2 seconds and a f-number of 4.5.