Jack Uldrich writes in the Minneapolis Star-Tribune that Wi-Fi is not enough: He takes the Minneapolis city-wide fiber/Wi-Fi hybrid network as a jumping off point for arguing for a national broadband policy that would provide the structure in which businesses and homes would have access to cheap gigabit Internet access. You can tell this is being written in Minnesota, because Uldrich wants the government to create a policy that encourage open competition and open access (read: non-discriminatory access in opposition to the way cable is run and the way that telcos tried to restrict DSL). But he doesn't outright state that the government should build this network. It's unclear who should pay for its construction if the market already doesn't have the incentives to build it.
Here's the primary source with more details: http://www.ieeeusa.org/communications/releases/2005/040805pr.asp