Feb 17, 5:35 PM (ET)
By DAVE CARPENTER

CHICAGO (AP) - The nationwide rush to go wireless appears poised to extend to its biggest city yet. Chicago is launching an effort to offer wireless broadband, city officials said Friday, jumping on the Wi-Fi bandwagon as similar initiatives proceed in Philadelphia, San Francisco and smaller cities.

Chicago has hundreds of Wi-Fi hotspots in places like coffee shops, bookstores and libraries, where anyone can walk in, sit down and connect to the Web. Hoping to extend that wireless blanket to all 228 square miles, the city plans to ask technology companies this spring to submit proposals for the project.