The Berkman Center’s Mary Bridges and Benjamen Walker — the sound designer behind Creative Commons’ animations — recently produced an audio postcard for NPR on the SXSW Interactive conference. It’s subtly funny, and a nice self-exemplifying piece of, and about, instant bricolage media. (Listen closely for the voices of Creative Commons board member Joi Ito and Mediarights.org tech chief and Fourth Wall Films panelist David Jacobs.)