QUOTE(lost_shaman @ Jul 11 2007, 01:39 PM)

Sounds likely to have been an Iridium Flare.
The Iridium Satellites have anteneas that are very reflective, like mirrors. These reflect sunlight in 30 mile swaths across the Earth's surface on a regular basis. They are quite impressive to see. Go to the Heavens Above website and enter your location and you can see the predicted visible Iridium Flares in your area.
Yeah, but this didn't move, it just showed up out of nowhere.