GNU Radio Opens an Unseen World

After few minutes of normal Linux messing around (“Takes forever to boot…. Haven’t got the sound driver working yet….”) he turns the laptop around to reveal a set of vibrating lines in humps and dips across the screen, like a wildly shaking wireframe mountain range. “Here,” he explains, “I’m grabbing FM.”
“All of it?” I ask.
“All of it,” he says. I’m suddenly glad the soundcard isn’t working.

Link
Links to some more SDR stuff: Flex-Radio, HPSDR (Next-Gen Open Source SDR!)