Paul Carr is in charge of the programme again - this week joined by Charles Arthur and Jemima Kiss.
Bobbie Johnson also takes part, interviewing Saul Griffith, an Australian inventor, engineer and author who also finds time to act as an adviser to Popular Mechanics and Make magazine. After getting a PhD from MIT he formed a think tank (or a "do tank") called SQUID labs with a few friends, based in San Francisco and they focused on innovative new technologies. So they've spun off projects including a new low-cost technique for manufacturing glasses, how-to website Instructables and human-generated power company Potenko. Last year he won a $500k Macarthur Genius grant and now he's working forthcoming wind energy company Makani. He talks to Bobbie about the process of inventing, and how he comes up with ideas.
We also hear what happened when the Guardian's web developers were freed from their work (y'know, keeping the site running and all that - did you notice?) and allowed to create whatever they wanted - within 24 hours. The first (of hopefully many) hack days was a huge success, and Jemima and Charles speak to some of the developers and organisers.
All this, plus your blog comments and this week's news (including a brief visit from the Mars Phoenix twitter feed).
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