House Planning Help – driven by Ben Adam-Smith – produce some very informative digests available as podcasts about particular issues surrounding self-build, ranging from interviews with experts (Mark Brinkley – @slopingsite on Twitter) to general overviews (Ecobuild) and issue-specific explorations (renewable energy, heritage refurbs).
An index of all the podcasts can be found here.
Home Planning Help’s website can be found here.
Maybe you can do an episode on collective self-builds Ben?
Motivating Collective Custom Build 