Jim Robertson and Michael Lucas-Smith of Cincom Smalltalk put out a podcast a week on software development. This week they kindly asked me to join them in their virtual studio -- good old Skype and Audacity! We talked about Domain-Specific Modeling, the history of MetaEdit+, and why we use Smalltalk.
The DSM podcast page has the download and some links to background and further information. You can also grab the 15MB MP3 directly or via its iTunes link. One piece of background info for a short section early on: Envy and Store are version control systems for Smalltalk.
Trying to explain DSM in a purely audio medium is something of a challenge, particularly in an unscripted interview where the participants can't see each other: the interviewer's expression is normally a good indication of whether you need to explain something further. I imagine that Juha-Pekka's interview with Markus Voelter did a better job partly because they knew the questions beforehand and could sit down together and look at the same screen. Of course that's also a risk: the listeners cannot see the screen. Mind you, for all its difficulties the audio medium has two major benefits: I don't need to get in front of a camera, and you don't need to look at me!