I wonder what these guys are using? Not as high density as what you want to do I'm sure. Just announced in our home city:
http://www.publiccontractsscotland.gov.uk/search/show/Search_View.aspx?id=DEC194619 by http://www.pinaclsolutions.com/aberdeen-wifi "Free public WiFi will soon be available across 24 publicly accessible council properties in Aberdeen, as part of the latest work to be delivered by the Accelerate Aberdeen programme. " Gavin.
