In case anyone has not yet heard:
Selective availability on the GPS satellite constellation has been turned off. The White House issued a http://www.whitehouse.gov/library/PressReleases.cgi?date=1&briefing=0press release on Monday, announcing it would be turned off at midnight - turned out to be midnight east coast time, not midnight UTC as one might expect, but reports from around the world confirm that SA did go off at around midnight EDT. The effect is to reduce the likely error in GPS position from around 30 meters to under 6 meters.
This turn-off had originally been promised by 2006 - no hard word on what brought it forward, but my guess is either the US Government realized that competing SATNAV systems would overtake GPS, or they found out that the Bad Guys already knew how to break the code.