It's like WPS1, but it's almost two years old. The Walker Art Center operates The Walker Channel, an online collection of streamable artist interviews and other programming.
This is one prong of the museum's strategy to maintain and expand their presence while their building is receiving a Herzog & deMeuron makeover.
Most of the recordings are interviews with people I've never heard of, and there are no explanations. But there IS a 2002 interview with Yoshiharu Tsukamoto, one of the principals in the cool Tokyo architecture firm Atelier Bow-Wow. They published Pet Architecture, which is a very cool book and site.
It's simultaneously heartening and depressing to note that this interview with an architect I'm very interested in is almost as excruciatingly underproduced as the early WPS1 bits I whined about earlier.