Stephan Urbach and Brett Solomon on hacktivism and digital freedom. Emrys Westacott on surveillance, children, and ethics. Andrew Bailey on coupon tracking. And Jonathan Gifford on the urban data trail. Show notes: http://www.cbc.ca/spark/2011/04/spark-145-april-17-20-2011

Dustin Freeman on digital devices that act like paper. Olivier Thereaux and Mark Miller on building better bus systems. The Dalai Lama on how technology effects our happiness. Baratunde Thurston on the merits of email lists. Austin Serafin on the blind using iPhones. And Sonya Buyting on the...

Ron Deibert on the internet as a basic human right. Evgeny Morozov on his latest book The Net Delusion. Chris Eaton on embracing the digital world as an artist. Mike Masnick on new business models for book publishers.Jane McGonigal on her new book Reality Is Broken. Show notes:...

Anil Dash on numbers and influence on Twitter. Meg Wilcox on an Ottawa research team taking telepresence to the next level. Waafa Bilal on the camera he’s implanted in the back of his head. Kelly Sutton and Cathi Bond on digital minimalism. And Eyal deLara on the pros and cons of cloud...

Marshall McLuhan on pushing the medium to its limits. Andrea Phillips on transmedia trickery - the popularity and the risks of transmedia marketing campaigns. Robert J. Sawyer on Web consciousness and his new book “Wonder”. Dan Misener on a return to unitasking. And Siva...

Julian Treasure on the pervasive nature of sound. Kate Crawford on the overload of information noise. Brain Whitman on hacks that filter out music you don’t like. William Gibson on how social media is making the internet like a mall. And Finn Brunton on spam filters and taking down spam...

Tim Wu on the historical cycling of innovation in information empires. Boris Wertz on what it takes to get your tech startup backed by angel investors. Kellee Santiago on the future of video games as communication tools. Ian Bogost on newsgames as journalism tools. And Amanda Cox on data...

Anshuman Iddamsetty and Andrew Whinston on digital currency. Kaj Hasselriis on mobile money in Kenya. David Schropfer on the mobile payment industry. Thomas Thwaites on the Toaster Project. Jeffrey Lipton and Dave Arnold on 3D food printing. Show notes:...

Spark 113 - May 16 & 18, 2010 Dave Tompkins outlines the history of the vocoder, Spark producer Elizabeth Bowie looks at the recent trend of group buying websites, June Cohen explains TED's Open TV project, Jon Kalish explores window farming, Frederick Balagadde researches microfluidics, and...

Michelle Hoyle on the hows and whys of "grinding" in World of Warcraft. Jennifer Jenson on the still absent female perspective in game culture. Mare Sheppard and Jim Munroe on indie video game making and games as art. Seth Priebatsch on the gamification of our lives. And Dan Hon on...