If you are an avid late-night radio listener (goerge nory, art bell), you'd know about this already, or read slashdot, actually I just heard it on our radio here at work, but we have a large 9k (the biggest) space storm coming, they said it could mess up our GPS navigation
http://www.noaanews.noaa.gov/stories2005/s2437.htm
I noticed nothing this morning, but I'll check the sat count on the way home, anyone notice anything?