I did find this about US spy satellites. http://www.hermetic.ch/crypto/echelon/sat.htm. The program started in putting satellites into orbit in 2005, so I have no idea where they are at with this project or if the project even went into action. But if they have the capability of getting eyes on any target in the world within a few hours thats pretty remarkable.
Anyone wondering where U.S. military investment is headed need look no farther than the next generation of spy satellites that are being built now and will start going into orbit in 2005.
The estimated 20-year price tag is $25 billion, making this program the most expensive venture ever mounted by U.S. intelligence services. In comparison, the Manhattan project, the World War II crash program to build the atomic bomb, cost $20 billion in inflation-adjusted dollars.
In the planned new system, the U.S. space-based cameras will collect from eight to 20 times more imagery than the present array, according to people at the Federation of American Scientists, a Washington-based group with access to some aspects of the secretive program. While performance details are classified, experts said that the modernized, miniaturized satellites would be able to identify objects one-tenth the size of those visible in commercially available satellite pictures. The truly revolutionary feature, however, is not in the sky but in the ground station computers that will capture the downloads of electronic imagery, process the data into usable intelligence and then distribute pictures to a growing throng of U.S. government agencies — the official consumers for the material. "Where the loop used to involve a half-dozen players, there are now scores of offices that want to put in orders for satellitecoverage and then get the data back fast, and all this traffic to be prioritized and the material processed," Mr. Pike said.