Twisst – tweets ISS passings

Twisst – a cool service that tweets you when the International Space Station will be passing you overhead, based on the location information on your Twitter account bio. As the ISS is naked-eye visible as a moving bright light in the night sky, and can be tracked by binoculars, popping outside to watch it transit could be a neat trick for the kids. Cleaning up my location info and following @twisst is definitely on my todo list.
See http://www.twisst.nl/