From blurb:<p>How have web companies like Google, YouTube and Yahoo! built successful businesses when most of their products are free?<p>That's the question Wired magazine's editor-in-chief Chris Anderson asks in his new book FREE. Gareth chats to him about 'freeconomics' and future business models for net content.<p>Chris also shares his passion for building DIY Drones. These are small unmanned aerial vehicles, built by amateur enthusiasts using 'open source' hardware.