IT Conversations is a site I would highly recommend to those of you who would like something interesting to listen to whilst you spend hours working at your computer. Like the title suggests the site is a large repository for recorded speeches, interviews and debates related to the IT industry. Of late the subject matter has begun to expand to cover more general interest (but still relatively geeky/intellectual subjects.
I highly recommend David Brin, Paul Graham the weekly Gillmore Gang.
David Harrison's musings on collaboration and I.T.