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1000 feet is easy for an 802.11 link with line of sight and directional antennas. Provided you can keep people from moving the things, of course.
Some guys at Defcon in Nevada managed a 37 mile unamplified link, could have gone longer but they ran out of road. Granted they were using 9.5" dish antennas...
BTW, 802.11 IS spread spectreum (DSS for b, OFDM for g and a)
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