This Way Up for Saturday 25 October 2008
The latest prison currency in US jails. Not cigarettes or books of stamps...mackerel fillets in a pouch!
A Canadian company reckons it can bypass all those irritating phone menus.
Smartphones are shaking up the mobile market, dirty tech tricks at election time, and the US military's mining networking sites.
The advertising agency that can call on an army of 400,000 people to promote people's products.
Carolyn Steel on how the challenges of producing and transporting food has shaped our urban areas.
We meet some of the traders and shoppers at a modern-day food market.