The key to EtherLinx's success is a single, small antenna that can be mounted just about anywhere -- on a water tower, on a building roof, or even on a billboard. It transmits data faster than a cable modem to a tiny, $150 receiver mounted to the side of a customer's home or business. That receiver is hardwired to a personal computer using standard CAT 5 wiring.
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In his New York Times article, reporter John Markoff cited other companies trying to duplicate EtherLinx's achievement. Nokia, Iospan Wireless, and Navini Networks all sell similar products, but to date none has met with EtherLinx's success.

Also have a look at the New York Times article. Thanks Duane