Last Sunday's Dorkbot Adelaide meet up was quite successful in the sense that the 10 or 11 people that came were very interested in the main presentation - the analog modeling synthesiser by Ben Davey.
Although there were some technical problems with the device at first - and we had to rely on a YouTube video in lieu of a real-life demonstration - Ben did some troubleshooting during the coffee break and was able to let the audience play around with his synthesiser. The synth GUI seemed a touch sluggish. However, I really liked it and I though it suited the touch interface really well.
Learn more about Ben's synth project here: http://synthesia.sourceforge.net/