New technology could put chill on hotspots: Emerging wireless access cards let users tap into the Internet anywhere they can receive cellular signals
The “hot spots” that drive wirelessfidelity access-better known as WiFi-might be in for a cool-down. WiFi enables Internet users to log on without a wire connection, as long as they are in a hot-spot area. The sites have become so common that the number worldwide surpassed the 100,000 mark earlier this year, according to JiWire, a Web-based hotspot information provider. Thousands of businesses, universities and municipalities have invested in the technology. But wireless phone companies are challenging the technology with…