Basically a hour or two of some guys talking about Source engine games and mods. They usually get onto quite interesting topics, like trying to define "Immersive".
Every week they'll have a prominent member of the Source modding community on as a guest too, like FTWinston (
Modular Combat,
Stealth Deathmatch), Campaignjunkie (
Radiator series) and £cho (
Zombie Mod Source/Situation Outbreak)
Their site is
here, they're also reularly featured on
ModDB.