Lots of interesting ideas and research here, I thought I would add some mention of blocks as visual aids to understanding and experiencing live code.
Dave Griffith’s did some work on the use of visual scheme closure blocks to visualise the live building and running of a musical performance. Pulsing with beats, clock pulses and activity. The project Scheme Bricks:
http://www.pawfal.org/dave/index.cgi?Projects/Scheme%20Bricks
Once you have the visual tools in place to aid development, new ways of communicating the liveliness of a system become possible…