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Hi Greg, geosynchronous satellite is perhaps the best bet. I saw an article in the October issue of the Northern Hemisphere version of Sky and Telescope all about observing geostationary satellites. According to the article, they move even slower than the object in your image appears to move - they perform little orbits over 24 hours about a fixed point in your sky, but his image has the orbits <~0.3deg in diameter! Their apparent altitude depends on your latitude, so from the US they would be somewhere near 6deg S declination in the sky.
Coincidentally I saw my first one the other day, weird to see a 9th mag 'star' remain fixed in the eyepiece of my Dob as other stars wandered by...
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