Clay Shirkey (rapidly becoming one of my favourite speakers) on how so-called "information overload" is really just lack highlighting how real-world social filtering hasn’t progressed very much online (yet) :

A TED talk on why just because you have a near-perfect easy scientific solution to a problem doesn’t mean that people will actually use it :

And don’t forget that Terry Prachette’s Dimbleby lecture is up on iPlayer…