Just checking through some frames I shot at 18mm this morning & found this:
http://i727.photobucket.com/albums/w...30UT18mmsm.jpg
Checked on Heavens Above and sure enough, it's an ISS pass. A single 1-min exposure, Canon 400D. 4:30am, 24 Dec 2011 local time (17:30, 23 Dec 2011 UT).
Cheers -