Just back from a conference in Brussels on Wireless Voice over IP and the Telecoms Market. There was a time when I believed that a combination of WiMAX (802.16e) and WiFi, surrounding a cheap fibre core would create a mobile Internet platform which would seriously challenge the cosy international oligopoly of mobile operators.
Don't hold your breath! Base on the mobile operators' comfort level expressed at this conference, any danger of that has been postponed till after 2009. You can read my report at:
On the Eurostar train I reread Greg Egan's Quarantine (http://tinyurl.com/8mknx). I assume this truly excellent book is on every Physics undergraduate's reading list?