San Francisco-based Cloud Nine Media, a developer of Wi-Fi sponsorship and location-based advertising technology, has been acquired by Wi-Fi network provider Boingo Wireless. Financial terms of the deal were not announced by the companies. Boingo said it will use Cloud Nine's technology to bolster firm's managed Wi-Fi hotspot network. Cloud Nine Media was headed by Sabastian Tonkin. Boingo said that Cloud Nine Media provided Wi-Fi sponsorship and location-based advertising at more than 6,000 locations in the U.S. and Canada.