Chris Dawson from Box Populi here.

Greg Lund-Chaix (http://slashdot.org/article.pl?sid=06/08/01/22342 54) from the OSL and I just did a talk on this very thing at the Podcast and Portable Media Expo. You can read more about his presentation here: http://staff.osuosl.org/~gchaix/2006/09/30/asteris k-and-podcasting/