Another great interview on FLOSS Weekly, this time interviewing Ben Fry and Casey Reas about Processing. Also, I listened to, but forgot to mention, the interview of David Buck and Chris Cason of POV-Ray last February.

By the way, here is a fairly simple visualization I recently did as an exercise of using Processing.js, a port of Processing to JavaScript. I created the background image in IDL and then used Processing.js to give the interactive annotations. I just bought "Visualizing Data: Exploring and Explaining Data with the Processing Environment" by Ben Fry and hope to do more with it in the future.