http://www.macrumors.com/iphone/2008/11/06/atandt-adds-20000-wi-fi-locations/
AT&T announced that it would be acquiring Wayport Inc for $275 million. Wayport operates Wi-Fi networks in 20,000 locations in the U.S. at locations including Wyndham, Marriott Vacation Club and Four Seasons hotels and McDonald's restaurants.
In theory, this should extend the available Wi-Fi options for iPhone users. AT&T has started offering iPhone users free access to their existing Wi-Fi locations. These new Wi-Fi locations will certainly be added to their existing pool of hotspots.